Hi, I'm developing a class selection tool in DevKit Conan exiles.

Hi, I’m developing a class selection tool in DevKit Conan exiles, I need help because I have no idea where to start, I’m copying some information, such as the Feat table call where I press the key and it appears, I want to put it in this class menu such as Blacksmith Carpenter Master of armor and other classes, in this case this menu would be for a single choice, but I want to leave it open for up to three choices, so in this case choosing one option should only deactivate the selection of the others, and the same thing with the 3 choices option, if anyone can help me I will be extremely grateful…
my Discord id stormshadow_live#6043