Ken:
Welcome aboard. You've found the right place to learn and have fun.
If you haven't seen the RetouchPRO Site Map, click on the link below my signature. Sometimes a picture is worth 1000 words; sometimes not!
You're right about
PS 6 academic version. Same functionality as the standard edition, so you didn't miss anything.
You're about where I was a couple years ago (interest / Photoshop knowledge-wise) and believe me there's no end to the learning opportunities and good times.
As time permits I encourage you to participate in whichever of the various challenge categories you find appealing. Anyone can start anywhere and you meet all qualifications. (There are none, except the desire to improve skills by 'doing' and getting constructive feedback.) Don't be bashful about posting your results. As time goes on your skills will continue to improve and before you know it, you'll have achived your objective of moving beyond your past career. How cool will that be!
Good luck and again, welcome. Nice to have you on board.
~DannyR~