Start out with what feels right to you. Go to a music store and try a bunch of things. You're going to know what feels good and what doesn't. Look at people around you that you admire. Figure out what they're doing, and try to emulate that in the beginning while you're finding your way.
It's not a big deal. Get something cheap, get something that feels good, and figure out what you want to do with it. Listen to music that inspires you, and try to emulate what you hear on records. People have been doing that for decades and have done really well.
Good luck,
Janek