Multiplayer: Assign Character, disable that character for others

Hello everyone. I have kind of a broad question:

Does anybody have documentation/link to a template where when one player chooses a character in the lobby, that character selection button is disabled for other players joining the match?

My 4 player game has 4 characters to choose from, and I’m not sure where to start on making sure that one character is chosen per player by choice. I would appreciate any info on this! Most of my lobby is ready to go, but character selection is kicking my butt. I’ve created an integer called “CharacterID”, and assigned a unique ID number “0-3” to each character, I just don’t know where to go from here. Thank you for any info!