Try this one out - I haven't used it, but hear that it's good. I taught myself embroidery by trial and error, but I do like several sites on the internet.
Free Patterns: Ant of Sweden - I really like this site.
Free Instructions: Johanna's Embroidery Page - I was searching for some instructions and this tells all about stitches and how to do them.
Good luck, Ladybug Mommy Maria!