How to wear custom accessories as models on player?

Hello Developers! :wave:
I got idea to make some game, but I have only 1 problem. I dont know how to wear custom accessories on player when he will spawn, or pick team.

In this situation I want so whenever player will pick Japanese team, hat and webbing will be weared on the character.

I really dont know what to do with this. I tried some methods, but they didnt worked. Im will be happy if you would help me with this problem.
Thanks for reading!:smiley: