Hi Sat Nam,
I can relate to you when it comes to the isolation you are feeling after ending toxic relationships. After my marriage ended about four years ago, I was solely focusing on my sons who were 7 and 10, at that time. I wanted to be there for them and make sure they were taken care of, but I wasn’t focusing on what I needed too. I never neglected their needs, and I’m sure you wouldn’t either for your boys, but you have to get out for yourself sometimes. I still have a hard time getting out now and I know I need to do more of it.
I’m nowhere near your area but one of the suggestions I will make to you is Meetup.com. It is a site that shows a variety of different interest groups that are free to join. There is a good chance that there will be something there for you. Good luck