Can't agree with Steve more start with the basics first like mastering the Pen Tool and then try other stuff.
Also two other things that might help you on your way:http://coreldraw.com/blogs/fluid/arc...tone-stud.aspx
and
http://www.talkgraphics.com/showthread.php?t=34489

I know both are for the wrong software but it is easy to change to suit Illustrator. Can I suggest that if you have a design that you want to replicate why not post it and maybe we can help some more.