I am 13 and I have been playing tennis since I was 5 so I would say im prety good I play some USTA tournaments etc. What are so good camps that are located in St.Louis Missouri?

I wanna know some important questions about tennis…
what is the suitable wieght (in KGs) and tall (in CMs) for tennis player ?
what is the avarege age for the tennis player to stop playing and retire?
CAN A MAN (me!) WIGHTING 95kg AND 173cm ,AGING 20 YEARS BEGIN PLAYING TENNIS FOR THE FIRST TIME AND BECOME AT LEAST A FAMOUS PLAYER IN HIS SMALL COUNTRY?!!!!!!