Moving to a new country with a different language is something to be very proud of. The nearest I got to that was moving from Alabama to Arizona here in the USA, and that was a bit of a culture shock for me! Do you have any hobbies at all? If you enjoy reading, there are sometimes book clubs or if you knit or crochet, for example, there are sometimes groups for that, just to think of two things. I have dealt with fairly severe social anxiety myself, and the only thing that seemed to help me was to go out among people and practice my social skills. I'm not cured, but I am definitely 80% better than I was a year ago. Try small steps at first and don't get discouraged with yourself.

(Adding a second vote for volunteering. It gets you out of your own mind and working for a common goal with other people.)