Hello. I’m really nube with IT (and RSS (and TTRSS)). Can you explain what should I input as “Tiny Tiny istanse” in the app? Where is it? And how I get acces to my RSS witch android?

I’m afraid to ask, but have you installed a TT-RSS server?

Well, I installed ttrss with Docker. I didn’t know, that it’s not enough

There is your instance. Is it accessible to the outside world?

I guess no? Because Docker is in my pc? But if I mistook now, where is that thing named instance?

I guess you need to read up on servers in general and docker first, then come back if you have questions. This is not a general how-to forum.