What tree do I own?

Bought it from a gardening store, it just said “bonsai tree”, yay, now I gotta figure it out.

"Carmona retusa, also known as the Fukien tea tree or Philippine tea tree, is a species of flowering plant in the borage family, Boraginaceae"

now that you know, you should research them (or search topics here)
they can be finicky, but super rewarding when handled correctly...