Welcome to the forum. First you need to decide what style of bike you want to build. Cruiser, road, etc etc. Then you have to decide what type of engine, 2 stroke, 4 stroke, electric. Then decide what type of material you want your bike made out of, aluminum or steel. That's an awful lot to think about. Decide those things then give more informed questions. There's a lot of members here who will help you out. College nice!