UE5 Lyra - Player Class Selection

Hello there! I am looking to use the Lyra Starter Game in Unreal Engine 5. I need a game mode that allows the user, before spawning in, to pick a class that spawns in the right mesh of that class and its weapons. There are of course two teams on a map so depending on which team, the models will be different.

I am not quite understanding how the UI is managed in Lyra since it is so modular. I understand that experiences manage things like UI but am not sure where to add in the functionality for a class picking system.