The truth is, you are not going to be very good, and lots of people who are orders of magnitude better than you can't make any real money playing piano, because

The truth is, you are not going to be very good, and lots of people who are orders of magnitude better than you can't make any real money playing piano, because that level of skill is so common. This isn't so much of a problem if your intention is not playing professionally. Learning easy and intermediate pieces is a lot of fun. Also making your own music using a MIDI keyboard and a DAW.