First off, if you are a complete beginner then please download our free chord sheet and piano for beginners guide. (It should be somewhere in the right hand margin).
Getting to know the basics should reveal what its all about and will give you an idea as to the work involved.
Once you have understood how to find all the notes, how to make basic chord shapes and how to play some simple rhythms (all explained in our guide that comes with the chord sheets) then you will be ready to explode your learning curve and start playing a wide selection of music. You will at last understand the whole process and although you will need to practice a lot to master any particular piece or song you will be capable with time an more importantly you will realize that it is possible to achieve. See our review of online courses for piano for beginners.