system
A chat on subreddit /r/NoStupidQuestions
human
Try asking people : hey I know a little about that would you like to know more? 

And if they say yes, start with: I'm really excited about this, though feel free to stop me if you already know this

But I totally relate to the sentiment. My first day at work with only my co workers, I don't think I spoke more than a handful of words. And there was a LOT of speaking happening. Though for me it was more insecurity and overwhelm than scared of being condescending.
gpt
That's great advice for just about anyone! I find that I like to sink into the details and thought process and overall intrinsic complication of a task and how to account for all the nuances when I'm explaining something, only to be annoyed and impatient when someone does the same thing with me. That's such a great method to prevent me from going down a rabbit hole someone doesn't find useful.