I had 0 friends until I was 13 and I really suffered from that through my childhood (but I had no clue how to make it nor what I was doing nor what others were doing), then I extensively trained myself to socialize and "be normal" and "don't be crazy" (I was thinking in those terms, it's so harsh). I can understand the frustration.
Then I did "improved the situation".
Had friends and romantic relationships. To be honest about it, it was very stressful to deal with, there were a lot of mandatory things to do that were really difficult to keep on doing continuously and were extremely overwhelming, I had to keep up constantly, I was tired, I was lying all the time about what I liked and disliked and was interested in or not, about what I wanted to be doing while I didn't want to do those stuffs, what I was actually doing and not doing, I had to lie about how I was feeling, I had to correct a lot of body language issues, I had to hide. I had to hide tons of stuffs and create a fake identity and behaviour that would be ***"""normal"""***, had to make a lot of mental efforts to build and maintain relationships in time, to understand what people were saying when making comments about my natural behaviour and what I was driven to and interested in, I had to correct constantly, to be available even when I wanted to scream because it was too much, and I had completely repress all of that in order to socialize and keep friends. I improved my isolation through. I had to repress myself a lot, to monitor everything, to be very fast (which implies that I'm stressing myself and making myself anxious in order to be as fast as recquiered), and so on. It was a nightmare to be honest, I had to destroy everything in me to keep up, I felt constantly uncomfortable.
It improved things... and it didn't improve things for me, it was an internal disaster to be honest.
I think it's better to socialize around something that's interesting, makes you feel good makes you happy than to try to socialize by passing/masking if that's what you're asking. It didn't improve my situation at all, I'm happy I learned skills doing that, but I'm even more happy to meet myself again.
If you need human contacts, I think you can improve the situation by going to social events and meetings around something that you actually enjoy and feel good with.
Althrough I learned a lot, I wouldn't advice anyone to improve isolation by doing what I did. I had no friends at all until teenage, then I "improved the situation", but it was a disaster for me. Go for things that interest you, events and gatherings around something you enjoy/like/want to try, that you really want to do, etc, and don't force nor push yourself. Otherwise it won't be healthy.