There are three tiers of fireworks in Minecraft. Tier one is the slowest firework you'll need for lift off, you can easily craft this with one gun powder and one paper. Tier two fireworks will help you to fly faster, and you'll need two gunpowder and one paper. Lastly, you can craft a tier three firework with three gunpowder and one paper. Just beware that if you're using a tier three rocket in the Nether you may wind up in lava due to the game's inability to load the graphics at such a high rate of speed.