I had some difficulties like these in the past, and what helped me was looking into amateur theater. There are part time (2 to 4 hours a week usually) amateur theater/drama schools that form closed groups and that group stays together over the years as they progress (with some inevitable degree of turnover obviously). I still talk to and meet with some of the people I met through that even though I left a bit after covid hit.

These kinds of spaces are good for people in our situation for multiple reasons:

• It puts us in an environment in which everyone is a newcomer, which helps when you struggle with that feeling of being the outsider.
• A lot of the people that go to that kind of space are people that struggle with shyness, loneliness or difficulties opening up, which means you are dealing with similar people to yourself.
• It inherently helps with shyness and closedness because the activity is all about opening up and being vulnerable. It's very shock therapy because you don't get any time to be nervous or second guess yourself, if it's anything like mine was, they throw you out straight into the water.
• You meet people of all ages and walks of life, which enriches you if you open yourself to it.

You will however have to look into the details of what kind of options are in your area for that and how they work and when the groups are formed and what levels there are and all of that jazz because I can't assume that it will work the same as it works here. If any of them are like my school was, then they offer smaller experiences (like a weekend or a month in the summer) so that you can dip your toes and get a feeling of how things work.

With all of that said, you should still look into regular therapy sessions while you are going through this. For people like us, our own brain is our worst enemy in this situation, and we need an external, specialized perspective that recontextualizes things for us. It will help more than you can imagine if you stick with it somewhat regularly.