I talk a huge amount, OP, and like a few PPs, have recently been diagnosed with ADHD.
I'm a self-help junkie and before I realised it was ADHD, I'd spent my whole life turning to self-help books/audio/websites to address each of my discrete difficulties (and I continue to do this as it's my key to winning at life).
For the talking, I found applying the strategies from "How to Win Friends and Influence Peoole" massively helpful. I'm very goal-oriented so knowing that applying x strategy will help me fare better in social situations helped me to stifle my own need to get my thoughts out of my head before I explode.
My aim would be to keep in mind that I need to give the impression that I'm finding the person I'm talking to incredibly interesting and to follow specific rules to achieve the appearance of social cohesion (despite the fact I'm merely emulating social norms and am dying inside from boredom and frustration!).
This works best in professional networking situations where the stakes are high because in those situations, my motivation to overcome my own foibles (i.e. for professional success) is far greater.
To be honest, in other purely social situations, it's simply not worth the massive effort it takes to do this, so I don't tend to jump at the chance of hanging out with people I can't be completely myself around.
However, my DM is incredibly talkative and tangential too (definitely undiagnosed ADHD IMO but she 'doesn't believe in it') and over the course of her life, she's built up a large network of eccentric friends (like attracts like) who value her and accept her as she is. They love her crazy stories and her animated personality and they don't judge her by unattainable neurotypical conventions, so she doesn't experience the isolation of being the different one - they're all united in their view that they're normal and the rest of the world is mad and/or boring!
I only have a tiny handful of neurodivergent
friends, but I aspire to build what my DM has over the coming decades of my life.