[keep in mind magic cannot change your appearance overnight to look like a completely different person, and you shouldn't be obsessed with looking a certain way.]
what exactly do you need help with? i could provide you with a spell to clear your skin, but your problem could be you don't like your hair, or nose, or something. there's a simple one you could cast, but it can only be cast in may, where you collect the morning dew and wash your face with it while visualizing your desired outcome.
keep in mind with all spells you need to work for your goal. so if you want beautiful skin, wash your skin daily and use lotion for soft clean skin. to aid to this, say a chant to a goddess [or god] who helps with beauty. personally, i say a quick chant to Hathor when i wash my face.