How Could I make a Character Class System

Hey!, so a while ago (a few months) i was searching on how to do a character selection menu, but, it quite didn’t work, So here i am again, I wonder how to make a selection system like the one seen in the roblox game “Soul shatters”, and then that character have custom scripts, localscripts, etcetera

(Ofcourse, In the process, don’t change the player’s character, just add that scripts, maybe in some point add accessories)