Start small-ish. Find a block you like the looks of at
http://www.quilterscache.com/
The site is set up to show difficulty level. Make one block. If you hate doing it, turn it into a hot pad and forget the whole thing. If you enjoy it, make a different block. As long as you pick block the same size, it will easy to turn them into a sampler quilt when you are finished.
Don't worry. There is plenty of experience on the board to get you through if you really want to do it. :)