i have been playing guitar for over 10 yrs.... not that i have master everything, but i think it is an on-going, keep practicing and improving thing. i found out that those who play guitar will also want to learn how to play a piano. Don't know if this is true, definitly true for me. Have you been trying to learn how to play the piano for the longest? If so, I think I've found a solution to your problem...
I would not recommend you to any service or product that I don't believe in (and I'm no easy person to convince). However, I have come across a website that has built such an easy system for students to learn how to play the piano.
In this
"The Secrets to Playing Piano By Ear", 300pg Course - Learn the secrets to playing literally any song on the piano with a few simple, "easy-to-understand" techniques and principles! Join Jermaine Griggs in learning tons of music theory, concepts, and tricks that will help you to learn piano by ear! Thousands of musicians have already taken advantage of this excellent program ... why not you?
Click here to learn the secrets to playing absolutely any song on the piano in virtually minutes!
I highly recommend it.