Try it, then come back and talk. That's the best advice I can give.

It's a different mindset when riding a single speed. You have two gears: sitting in the saddle and standing on the pedals. You learn to use momentum to help you get up the hills, and when momentum is gone you learn the importantance of good balance as you "walk" up the hill like working out on a stair stepper. You learn to coast down the other side and say "Weeeeeeee!" because you top out your cadence pretty quickly.