Renton and Coco give good advice.

I wouldn't worry too much about winrates just yet. Give it a try, and play a bunch of hands at the appropriate level. Post some stats, or hands that gave you problems on these forums and soon enough you'l be well along your way to becoming a better poker player if you analyze your play and commit yourself to getting better. Also remember not to get caught up on small sample sizes.
Play a lot and good luck.