The best place to start is your locale SBA they will be able to help you with everything you need and possibly direct you to the correct investors.
Pitch you idea to friends and family they will be your easiest sell.
start small - find a way to start you idea as small as possible the more you are able to document that your idea works the easier it will be to pitch to investors and the "more yes ill invest answers you'll get."
Most important stay positive and you will succeed if you believe you make it you will.