Welcome to knitting, and to this site!
I think the best thing you can do is become familiar with casting on, put a bunch of stitches on some knitting needles and just go at it. Practice the knit stitch first, do lots and lots of rows of just knit stitches just to get the hang of it, then try to tackle the purl stitch. Once you're comfortable with those two things, the sky is the limit! And when you run into trouble, we're all here ready to help out!
Practice, practice practice!!! xxx