Learning to Play a Musical Instrument

I go in cycles. I think I'm now in the piano mode. I hear that the ideal way to learn is to:

Memorize

Everything.

Now that's intimidating to me because I doubt my ability to do that. 

So what am I to do on piano? The Sudnow Method? Tempting. The Play Like Me program? Tempting. Or perhaps the Piano For All program.

But whatever I do piano-wise, I have to be be committed, persistent, and dedicated.