you can learn that easy! youtube can help. Also the Hal Leonard series of Music theory books can help immensely too.
I have one for guitar in front of me now, lol.
Just memorize the finger positions and patterns and you will do fine. Music theory is basically abstract mathematical formulas, it is good to use as a reference though and shows you the patterns too.
When are you going to buy your piano, and do you have space for it?