I just got in from my first day on the course this year. UGH. Wasn't pretty.
Anyway... depends on what you want to accomplish. If you just want to be able to play socially, its no big deal. The most important thing is that you know the rules. Just about anyone can play as long as you don't bother the other players. The most important thing to remember when starting out is not to hold up the play of your group & especially the group behind you. If you're falling behind, pick up your ball & catch up. More rules & stuff here:
http://www.golf-golfing.com/golf_rules.html
Of course you should spend some time at a driving range where you can also work on your chipping & putting. Take a few lessons so you can at least hit the ball in the general direction you want it to go most of the time & learn the proper etiquitte. That's really all you need to get out there and start playing.
If you want to be GOOD thats another matter entirely. Personally, I don't enjoy it enough to practice enough to be good at it. Practice is the only thing that will help you get better.