not sure if it was mentioned, but some gyms, when you get a membership, will give you 2 or 3 days(appointments) with a personal trainer to help you get started and evaluate your physical abilities and such... check around before you get a membership!
When I worked out heavy in highschool, I alternated what I did, that is, I'd do different 'portions' of my body on different days. (chest/triceps, biceps/back, legs/shoulders etc) and another method is to do a couple of the "pull" muscles one day(ie: biceps, back, hamstrings), the next day do some of the "push" muscles(ie: chest, triceps, shoulders, legs/quads/calves) and so on... basically, in 3-4 days I'd have my whole body done... but really tho, there's many different ways to go about it, find what's best for you! And don't overdo it, especially when your first starting out!!
and similar to Surreal's suggestion of Yoga, STRETCH!!! But do try to warm your muscles before stretching, and stretch after your workout. And stretch
properly!!
lastly, as others have mentioned, proper form is better than heavier weight!! Personally, I have more respect for someone who can do x amount of reps with xlbs of weight
slowly than the person throwing heavy weight around and contorting their body just to get the weight lifted...
anyways, good luck and have fun!! When my wrist fully heals I think I'll be starting to lift a little again too!!
cheers!!