I was where you are now last January. I bought a couple of quilting books, took a couple of classes and just started.
I frigured that if I made a quilt for each of my 4 boys, then by the time I finished I could make a quilt for me and I'd know what I was doing.
Today I finished the 4th quilt. The first two were pretty much just squares. The next one was a quilt-a-long with
http://crazymomquilts.blogspot.com where I learned to make triangles and all sorts of intricate blocks. The last was a rectangles quilt.
In a couple of weeks I start on my first commissioned quilt (gulp!!!) Just jump in and enjoy it. My kids adore their quilts.
(Photos on my blog
http://dancingwithfrogs.com under 'Frogdancer quilts'. All except the last one. I haven't photographed the finished piece yet.)