You should try to keep score but don't worry about a bad score. The most enjoyable time in my golf career was when I first started, I would improve my score almost every time out. When I started playing I used the max 10 rule (I wouldn't take more than a 10 on any hole). I would also improve my lie whenever I felt like it and I would occasionally take the ball out of the trees and throw it into the fairway. I also wouldn't take more than 3 puts on any green to keep up the pace of play and also to not get frustrated.