Cured superglue can be sanded and polished just like plastic. Dozens of simple kits have parts that snap together. You won't need glue to assemble them, and you may not need to paint them, either. You can move on to more complex kits after you get your feet wet. Several brands are available, usually in hobby shops.
Enamels are oil-based paints and they require paint thinner to thin and clean up.
Enamels are easy to apply and come in a wide assortment of colors. Enamels also are available in spray cans, many matching bottled paints in the same line. Water-based acrylic hobby paints are becoming more popular. They are more difficult to airbrush, but they are less toxic than enamels. Most acrylics are thinned and clean up with water.