Everyone's first match is shall we say, less than ideal. You know your results will suck, so just show up as prepared as you can be...have fun and be safe. Sounds like you did just fine. Cherry pick your future matches and avoid extreme weather. If you have a mobility issue with a particular stage feature discuss your options with an SO or Match Director.

Competition is good training both mentally and skillset wise. Granted timed stress is not the same as a real world imminent threat, but it will improve you. Classes are good, but frequent competition can yield big improvements.

Congratulations on your first match!