JACK-OF-ALL-TRADES
A person who’s okay at everything but never great at anything. They’re like a used car, still works, but you know it’s been around.
He can play piano, fix phones, and design websites, but he can't be called a pro at any of them.
She can dance, write, and cook, but she's never going to be a star at any of them.
He can build a house, fix a car, and mow lawns, but none of it is impressive.