Would I look okay with Platinum blonde hair?
I wouldn’t. Your hair is much to dark. Once they remove all of the pigment to make it platinum your hair will be fried. Think split ends and frizzies like crazy. Not to mention, if you ever want to go dark again, it will be nearly impossible to make it look natural. I think your dair hair looks pretty on you. If you want to lighten it up, try a medium blonde first. If you insist on going platinum, do it in 3 steps so that the damage is a bit less.