Things are incredibly busy at work, so not getting to the courts as much as I would like. But, I too am trying to refine my serve. It hasn't quite been the same after Shoulder surgery 4 years ago. Keep trying different methods. Anyway, I wish there were more leagues and what not here, especially flex leagues. I loved playing those in Texas. Good job on hanging with the higher ratees. That will go along way to helping your confidence too. Good job. Keep playing. So when is the next Tourny?
Hey congrats on signing up for a tournament. Just take deep breaths, don't force anything. While warming up however, hit some a little harder to help loosen yourself up. Most importantly think. You'll do good.
I do not play in leagues (maybe I should drag myself to do it), but I play singles most of the time. I enjoy doubles for fun, too. It's just a matter of how many people are available at a time I can/want to play. Hope you are doing well so far this year :)