Hey man, I might have a little perspective on this. I used to be the same way, not talking much and being not very good at social interaction.

Over the past year I've been working on overcoming a lifelong fear of failure. Think perfectionism to an unhealthy level. Once I realized what was going on, I started to see just how much of my life it was affecting. I was afraid to put myself out there because I was afraid of not being accepted, or afraid that I'd fail, or whatever.

So I consciously shifted how I looked at things. I stopped giving a fuck about failure and what people think of me. I started to just be myself, and say what I'm thinking (where appropriate obv). It doesn't happen all at once, and it takes a lot of effort. You're learning a new way to interact with people!

Don't stress about being engaging or funny! Half the time when someone is laughing at something I said, I'm just calling something like I see it, or being a little self-deprecating. I fuck up all the time and I'm not afraid to call myself out on it. Just be yourself!

You might have something else going on, but that was my problem and how I went about solving it. Hope it helps.