You may have to build up your track a little on curves, as these will be likely places your train can derail. S-curves especially, if you have them, can be tricky. Make sure you have enough clearance in your curves to fit your longest train cars. Cork or foam model train roadbed should be used under tracks and can be bought at hobby or hardware stores. If you're just starting out modeling, it can be difficult to know if you have enough clearance for long cars. Before installing your track, use your hands to guide your train around curves to see if it fits. Track installation may vary, but in many cases, you'll need to solder rail joints to connect them. Avoid soldering turnouts, where a train transfers from one line of track to another. These often need to be replaced. Use a metal file to smooth bumps or ridges on your track that may cause a wheel to jump the tracks or get stuck. Attach feeder wires as indicated by your model set. In most cases, feeder wires will connect to the bottom or outside of your track rails at 3-foot (.91 m) intervals. A beginner set will likely come with a power converter, but more advanced sets may requires you to choose between DC (Direct Current) and DCC (Digital Command Control) power. Starter model train sets will likely come with a control panel, but DIY models may require you to build one. Search online for tutorials on how to wire one that is simple and organized. This includes almost all surface features, like trees, rocks, tunnels bushes, roads, bridges, houses, and so on. Use glue to attach scenery pieces after the terrain is formed. Use paint to represent flat surface features, like rivers and roads. Keep perspective in mind when making your scenery. For example, large trees should go in the foreground and small ones in the background to create the illusion of distance. Dioramas are a 3D representation of a scene, like a house. These are great additions and can add a sense of realism to your model. You can buy scenery props at most hobby shops and craft stores. There are also plenty of resources online that illustrate how to make your own.
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One-sentence summary -- Lay the track. Wire your track. Add the scenery.

Moisturizing your hair is extremely important for curly hair. Curly hair has more difficulty getting moisture to the ends because of the shape of the strand. This can cause dryness and dandruff. Moisturizing your hair helps prevent this. Use deep conditioners to replace lost moisture in your hair. Make sure to leave it in for at least 5 minutes, but longer if you have time. Then rinse with cool water to help seal the cuticle. Deep conditioning your hair helps prevent breakage and split ends, which helps promote hair growth. Depending on your hair texture, you can deep condition your hair once a week, or once every other week. If you have time, go over your hair with a blow dryer on high heat for a few minutes while the conditioner is sitting on it. Heat will help your hair absorb the conditioner more effectively. When trying to grow longer, thicker curls, it is especially important to moisturize the ends. As your curly hair grows, your hair's natural oils have difficulty coating the whole length of your hair strands. In addition to using deep conditioners, try applying olive or coconut oil into the ends of your hair A little bit of olive or coconut oil goes a long way. A dime-sized amount of either oil should be sufficient to moisturize your ends. Treating your hair regularly with masks containing proteins and fatty acids can help make it thicker and stronger. These masks are easily made at home with ingredients in your fridge. Eggs and avocados are 2 great foods that can be used to make hair treatments. Beat 1-2 eggs in a bowl. Put the egg on wet hair for 30 minutes. You can also mix in an additional egg and a tablespoon of oil (coconut, olive, jojoba). The proteins in eggs help strengthen and thicken your hair. Do this 3-4 times a week. Rinse with the coldest water you can stand to keep the eggs from cooking in your hair. Mash an avocado and banana together until they are a uniform consistency. You can also mix 2 tablespoons of oil (coconut, olive, jojoba) in with half an avocado. Massage this into your scalp and leave for 30 minutes. Wash with plain water, then shampoo with mild shampoo. Do this 2-3 times a week. Jojoba oil is believed to encourage hair growth. Massaging it into the scalp stimulates blood flow and helps hair grow. Jojoba can also help add volume to your hair, making it appear thicker. Jojoba oil is a sealing oil, so use it on wet hair after you condition your hair to seal in moisture. Jojoba oil helps keep your scalp moist, which helps the natural oils in your scalp. When your scalp's natural oils work, your hair grows. Jojoba oil also helps cleanse the scalp. Clogged follicles in the scalp can reduce hair growth. Grapeseed oil is another good, lightweight sealing oil. Moisturizing oils are heavier than sealing oils, so they can be used alone to moisturize your hair. Try using coconut or olive oil. Apply it to your hair and scalp and leave on for 30 minutes for a deep conditioning treatment. Try applying castor oil onto your hair and sleeping in it. Castor oil is supposed to give body to thinning hair and help cure bald spots. Massage it into your scalp before bed 2-3 times a week for a few weeks. Many essential oils are used to increase hair growth, strengthen hair, and help with hair loss. There are many ways you can use essential oils. You can apply approximately 20 drops to your scalp, working it down your hair. You can also mix it with other oils for multiple benefits or add a few drops to your shampoo. Rosemary, thyme, lavender, cedarwood and sage oils are often used for hair growth. Eating a vitamin-rich diet can help encourage hair growth. Foods rich in protein also help hair grow faster. Eat foods with fatty acids, such as salmon and other fish, avocados, and nuts. Foods rich in beta carotene and vitamin A, such as sweet potatoes and carrots, help hair grow. You can find protein and iron in foods such as lean meats and eggs. Leafy greens and beans contain multiple vitamins that promote hair health. Fruits contain vitamin C, which helps encourage scalp health. You need to include vitamins A, C, H, all the B vitamins, zinc, keratin, copper, and iron in your diet. Buy fruits, vegetables, and iron-rich foods for healthy hair. You can also try supplements if you can't get all the vitamins and nutrients you need from food. . Biotin is found in the vitamin-B complex, and is thought to help you grow thicker, stronger hair. Try taking it as a supplement, because it doesn't easily absorb into your skin.
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One-sentence summary --
Deep condition your hair. Moisturize the ends. Apply a natural mask to your hair. Massage jojoba oil into your scalp. Use a moisturizing oil. Apply essential oils to your scalp. Eat a healthy diet. Use biotin