dont work team selector

I want when a player enters a team, the counter says 1/2, also that a player who is in a team can not re-enter it
Also, for example, if the team is filled, then the team selector and the counter is turned off (this is almost working).
Can you tell me where I can find an active good community of island creators? In the off.discord channel uefn not so often answer.

I would be glad if you could help me.