It is very sad that you are alone in this city.
But maybe you shouldn't hurry.
Try to give this city a chance first.
It's sad that you can't do taekwondo, but maybe you like something else? Try to find what else you can do in the city, something that should definitely interest you. But it is better to choose something where there will be other people. So that you can communicate and make new friends.
If you can't meet someone offline, try online. I think there are also people in this city who lack communication. Try to meet someone on the Internet, and then you will be able to meet this person in real life.
You will always have time to leave everything and go. But do not rush with it, especially when you like your work.