Congrats on starting riding! That's the most important thing.
I like the training plans in the book "The Lance Armstrong Performance Program" - easy to understand, don't take too much time out of your week. While the light lasts, you can extend your ride home to become your workout. There are 3 levels of 7-week programs (do the beginner one first, duh) and a bunch of ideas for drills that you could add to your commutes.
That said, don't fret too much about the plans, I would say, at this point, just get some miles in, get comfortable on your bike, spin all winter, and start training for real in the spring.
My $0.02, FWIF, YMMV, etc. etc.