Just don't jump on anything too big too soon.
When I went from riding 125cc bikes as a learner to riding just a 200cc bike, it felt like a world of difference of power, despite still being a small bore engine. When I finally went up to my 650cc cruiser, I was more ready for it, then despite being 50cc less, moving to sports bikes was again a totally different thing.
I don't know how the whole bike riding thing is in Murica, but going too big too soon is the worst thing you can do.
