Op this is understandably a bit hurtful but can you re-frame it as a good thing? Free feedback!
Next time you find yourself going on about your previous work colleagues, just say out loud, sorry I bang on too much about that place! So they know you are self aware.
And introduce some other topics as pp suggested? There are lots of other things to talk about! Pets, the weather, food and cooking, news and cultural events in your area, plans for the weekend and summer travel. Show genuine interest in others without being nosey and you can’t go wrong!
By the way, you are quite right not to engage in gossip! Very wise and not silly at all!
The other approach is to mention your disability and be open with a few trustworthy colleagues. Explain why you may experience certain difficulties (if you still do). Most genuine people would react very sympathetically to that.
Edited to say: but only do that if you think they have a genuine point to make. As other people have said, you don’t sound boring at all!
Finally, please remember op that we humans are a miserable race generally, and our brains are programmed to think and speak about the negative things we are experiencing. You very rarely find people huddled in corners talking about how wonderful someone is! So please keep in mind you will have lots of good qualities that your colleagues don’t chat about! So don’t take this too much to heart!
You sound like you have a great sense of humour, so exploit that to the max too!
Good luck 💐