Character Class Creation

Hello all, I’ve been developing my game and I ran headfirst into a problem. The problem is that I have multiple different character models with stats, skills, etc. but right now I am working on creating the GUI for the character creation screen and found out that I need to find a way to make different classes for different roles. For example, since I am developing an RPG I have classes like Magicians, Thiefs, etc. so how would I make it so when I click one of my buttons on my character creation screen to make the system pick that specific role with the correct model and stats?

Have you read any programming tutorials at all? Do you need Inheritance?