Here is an easy to read piano keyboard diagram, complete with black-note labels and alternative white-note labels. This diagram leaves out double-sharps and double-flats to avoid excessive clutter.
You may use this diagram to understand the note layout. But if you desire a strong familiarity with the notes and with the piano, start learning as many tunes as you can.
Go to "free piano lessons" for some ideas on how to get started on the piano.
Familiarity with the notes on the keyboard is only the beginning when it comes to learning to play the piano. If you are committed to becoming a piano player, start with a well-organized plan for progress.
Go to "How To Play The Piano" for just such a plan.
This picture gives you a view of the whole keyboard, with the names of the white notes. As a piano player, you are going to be developing your own "inner keyboard" in your mind, so the picture you see here will become not only an image in your head, but a geographical location where your hands, your fingers become comfortable and confident finding their way around. You will know the piano keys by sight and by touch. This will develop over a period of several years, with lots of practice, while learning tunes, scales, chords, music reading, and all kinds of piano music.
(Essentially, you want to know the piano keyboard so well that your hands and fingers feel completely at home on the keys. For some people this happens quickly, but for most it takes 4-10 years. I played the piano for about 13 years before I felt completely comfortable and confident at the keys. That doesn't mean I did not enjoy playing for those first 13 years. It just means I never had a sense of being completely in command of the instrument and capable of controlling all the elements of the music. But now that I've had the sense of confidence and comfort for over 20 years, those first 13 years of struggle were more than worth it. Playing the piano is now one of the most enjoyable things I do. When I'm at the piano, it's like a whole world of pure pleasure and fun. I highly encourage every piano player to keep at it, and keep keeping at it. The confidence and comfort and control will come. Just don't quit!)