welcome to A.T. owd chrome dome. No, you do not need to be psychic to do tarot. However, you may find that after you're doing tarot for awhile that your other abilities begin to develop---or not. Sometimes developing one ability leads to other abilities developing on their own-without you even thinking about doing so!
i would not worry so much about what you've read. just pick up your cards and see what you can see in each card when you read. have fun with it, and practice, practice, practice. having a few books to fall back on, and/or to read to get an idea of what that particular author feels is the meaning to each card is handy, but really, you'll soon find it doesn't matter what meaning the book(s) give to the card, but what YOU think it is saying. Just something you'll soon get use to, and especially if you hang around here long enough!
I hope to see you around the boards here! Welcome!