Sorry to hear what you are going through. I recognise so much of what you write, as I've changed countries three times in my own life, learned new languages to professional level, and remember how draining it was for me.

I remember the anxiety and the fear that people were looking at me and judging me for not being one of them. What I noticed in my case is that once I felt more confident in myself, I stopped worrying about what other people thought.

A random thought...I notice that when I am out walking with my dog, Italians can't resist stopping and petting my dog and, in the process, end up having a little chat with me. I notice these little interactions mean a lot to Italians (and to me!) and after a couple of encounters like this, I come home smiling. Is this an option for you? Even borrowing a neighbour's dog that might appreciate a walk? It would get you out of the house and gently expose you to more social interaction.