Here are a number of different resources you can use for learning piano.
Some are free, some are paid, some are by me, some by others.
If you are a complete beginner, you can start with my Free Beginners' Guide to Learning Piano.
If you want to learn chords (who wouldn't?), there are a few things I have for you:
I have created a great online chord course called You Can Play Piano Chords. It teaches you everything you need to know about chords and playing chords. You can do this from home.
You can also download for free the Ultimate Piano Chord Cheat Sheet. This tells you what the notes of the chords are.
If you're after a chord reference with the chords on piano keys or written music, then I'd recommend my book The Piano Chord Chart Book (on Amazon).
You can also read more about the book here.
If you want to learn how to play written music, there are a few good options.
Every week I send an email and which more often than not includes a little lesson. And if there's a video with this lesson, you'll find it on the Piano Lessons Info Youtube channel here.