Do you think you need a bra because of the size of your breasts or do you just want to wear a bra because you like the way they look? Or, perhaps both?
Sure. But they must be your bras. Do not fondle them in lingerie stores or steal them from strange women or your mother, that’s a whole different game.
I’m just going to suggest that if it is because of the size of your breasts, you should learn to put your ta tas into the bra properly. I would also suggest a fasten in the front bra with underwire. The underwire will take the fun out of it for awhile until you get used to the pain.