Hi all,
I too am teaching myself the piano. I am now 64, but started when I was 58. The only thing that I have not said is I have been playing the accordion since I was 6 and ther concertina since I was 3. So the right hand has been trained well, it was the left that acted like someone stepped on it before I started to play.
With a lot of work, I have not managed to get the left hand to be faster than the right which I can tollerate since with just a little work on the right I can get it to catch up.
I too also do not worry about a teacher and how I am playing the piece of music so long as I am enjoying playing. That is the most important aspect of playing the piano. Some times a teacher can be a detrement rather than an inspiration and kill your love for the instrument. What I have found is two things, 1) do not be enslaved to notation. Listen to what you are playing. If you are going in the correct direction, the music will talk to you and tell you how it wants it played, especially Chopin. And 2) record yourself and listen to how you play. It will do wonders for improving your style, interpretation, and the overall sound that you are producing.