Боб,
A couple of disagreements:

***"I hope I answered your question". However, I know an English speaker would write "I hope it answers your question".

I would use either sentence (I speak American English).

***Previously, when I had a very little experience of communicating in English, I often used to say: "I understood you!" to confirm someone's words were clear. But later I noticed nearly no one speaks like that.

I use "I understood you".

Scott