Thank you JohnRies and Allison2- for your input.

https://graciousgrowthaba.com/why-autistic-indi...

Autistic individuals may interrupt due to differences in processing speed, difficulty reading social cues, or "cooperative overlap"—an enthusiastic communication style meant to show engagement, not rudeness. Interruptions often occur due to fear of forgetting thoughts, intense focus (monotropism), or the need for immediate clarification.

Common Reasons for Interrupting:
Cooperative Overlap: Sharing personal stories to relate to the speaker or showing enthusiasm, which can appear as, but is not intended to be, an intrusion.
Processing Delays & Memory: High-speed conversations can be difficult to follow; the urgency to speak before forgetting a point can lead to interrupting.
Reading Social Cues: Challenges identifying the appropriate "turn" to speak or spotting nonverbal cues that signal the end of a sentence.
Direct Communication: A preference for direct, efficient communication, which may result in interjecting for clarity or to get straight to the point.

Why Being Interrupted is Difficult:
Conversely, autistic individuals may find it difficult to be interrupted themselves. This is often because they have strong focus (monotropism), and being interrupted can break their train of thought and make it hard to resume, or they may feel ignored.

Strategies to Manage Interruptions:
Use Visual Aids: Use notes or write down thoughts immediately to avoid forgetting them.
Nonverbal Cues: Use a specific, planned gesture (e.g., raising a hand) to signal a desire to speak.
Set Expectations: Communicate directly about the need to finish a thought or use a timer to structure conversational turn-taking.

https://embrace-autism.com/cooperative-overlap-...

Why Autistic Individuals Interrupt Convos & What to Do

https://graciousgrowthaba.com/why-autistic-individuals-interrupt-conversations-what-to-do/

I struggle with interrupting myself. I hear myself doing it but it's hard to stop it before it's out. It makes me feel bad when I do it with my mom but I know I do....

Another observation: Autistic people on average value Truth much more than they do consensus, convention, courtesy, or saving face (for lack of a better term). It takes a long time for some of us to comprehend all of the implications of this (and even then, we sometimes blurt something entirely on impulse), causing us to offend people entirely by accident.

That said, you'll need to state directly in private what in his conversational style and content is likely to be taken the wrong way and how. Sadly, it seems at least to me that interruption sometimes is the only way I can get an important point across before the conversation moves on. After all these decades I still have trouble determining when it is appropriate for me to speak.

I have also learned that corrections to factual errors made in private are typically much better received than is directly contradicting someone in front of others (even when the individual is flat out wrong).

Thank you so much BrianBrooks for all this info. The first part is what I'm dealing with. I will definitely check out the website mentioned.