I joined a local club and particiapted in one of the major tournaments this last summer! I had never played in anything competitive before outisde of some simple bets here are there.
It was an overwhelming expereince to start! Lots of nerves, like the first tee jitters but amped up! I found that led to mistakes which led to over compensation and then I wasn't playing my game. The next day I slowed things down and got back to playing the course the way I know to play it. Next year I'll be more prepared and will be taking a totally different approach!
I think by taking more of a course management style and actually playing risk adverse will lead to a better competitive performance and help build confidence. That confidence can then help you get on a roll. I will not be deterred from playing an iron off a tee or laying up on par 5 if I can increase my chances of an easy par and maybe a longer birdie put. I want easy GIRS, no penalties, and chances at birdies.
I'll let you know how it goes this year!