Art kids are cool but also kind of pretentious and annoying.
You have disadvantage on any strength checks.
You start with the following equipment:
(a) A prop weapon or (b) an instrument of choice or (c) painting supplies
(a) A disguise kit or (b) forgery kit
A backpack with equipment of your choice that fits your class (to be approved by DM).
Theater
You have a thing for being over dramatic about EVERYTHING and people kind of hate you but you're an amazing actor. You have advantage on and charisma checks and skills. You also have a crazy memory and can memorize anything you find and can recall it at a moments notice.
Visual Arts
You're more quiet than the other art kids but you know your way around any visually artistic medium. You have advantage when dealing with paints or other art materials and can create realistic forgeries of anything.
Music
Essentially the same as a bard without the magic. You have advantage on performance checks and a guitar definitely makes a pretty sick weapon. You can also use inspiration which follows the same rules as bardic inspiration.