Rpg Classes

Im currently making an RPG adventure for my siblings, but I'm dumb and don't know anything about commands, does anyone have an idea how to get a class through commands?Here are the classes: Tank A crowd control damage dealer with high health and high defense, has below average damageHealer A support with two abilities, one to heal a single person, and one to heal a whole group, the Intelligence of the group, has low damage and average healthWarrior A high damage dealer with great strength and a over average health, sacrifices defense for better damageMarksman A damage dealer with range, has arrows for multiple situations, below average health, can grapple to higher places to stay out of reach for better role executionWizard/Sorcerer/Warlock/etc. A user of the magic arts, capable of only 5 spells, Fire ball, Earth Wall, Water Circle, Wind Blast, Tornado (can select each spell from their inventory and use their wand to use the spell)Rogue/Spy A nimble and quick fighter who uses the dark and their blending to the environment (invisibility) to get their kills(If you can only do one class, that's fine too, one class made of command blocks would be very fun to play around with in the world) via /r/MinecraftCommands https://ift.tt/3iCJd2n