Never mind.
You're absolutely right; email doesn't work for piano lessons. I was just exaggerating the difficult situation I'm in.
Since there are no teachers around in my place, and the best available internet connection is not practically up to online distant lessons, I think of having a sort of a "piano adviser" (I guess the term is widely used in the US and they usually use it for an advanced level, right?).
I mean I need a professional who will structure my learning, choose books and pieces for me, give me advice... guide me all the way along. Also, I can record short videos of my practice so as they can watch it and critique my trials. Similarly, they can record short videos of themselves if they want to demonstrate anything.
However, I'm not sure how to find that teacher.
By the way I used to study with a good teacher via Skype, she was a real lady and very well-educated, unfortunately, the internet was a problem.
#many musicians can't explain themselves well!
Relax and enjoy life to the lees.