Jumping right in would be a great way to injure or overtrain yourself.
Start with easy full body workout 3x a week, with highish reps (10-12) for a few sets and far away from failure. If you didn't squat or deadlift before, now is a good time to start.
Then, check out the articles on this site (esp. Waterbury's) and pick a good routine. ABBH (Anti BB Hypertrophy program) or TBT (Total Body Training) are something that worked for many people.