Which is a simple way in order to make some stat presets for your RPG classes in your character creation screen? Like you have 3 RPG classes and one GUI button for each and when you press one button, the stat preset for that specific class will be loaded. For example, you pick a Warrior who has 10 strength,10 dexterity and 9 wisdom. Stuff like that. Thanks!
These system can get complicated and there are literally 16 billion ways of doing it, from complicated inheritance to just straight linear code which a lot of case/if statements. It would probably do you some good to check out some tutorials, there is one that is very specific to RPG which you will find a link below, work through it and see if you find it helpful.