First time golfing - any tips?

[KSigkid]

Hi all,
So, I'm going golfing for the first time on Monday. It's something that I've wanted to do for quite a while, and would have done last summer if not for a broken hand.

Any tips for a first-time golfer? I'm fairly good at picking up sports quickly, but I'm also a bit too competitive at things, so I'm worried I'll just frustrate myself.

Any and all hints are welcome.