Psychology major, art minor?

Would this be a good idea? I don't have much experience with art, but i really like art, am a creative person and think its important to have a wide range of abilities. Plus, if this is something i really want to do, ill probably get it not some arts class and practice before making any final decisions, its just a thought. Also do i need a portfolio with an arts minor? If i was going to do this, what high school classes should i take to be prepared?