Likewise, I thought I was bad at public speaking and avoided it almost entirely until my last couple years of university. By then I found myself surrounded by friendly, curious peers who were happy for me to nerd about whatever it was I became a semi-expert on. That confidence served me well once I needed to lead/train a team at work.

Doing a presentation on Zoom seems kind of pointless as you lose the connection to the audience. I'd rather just assign a pre-record to watch and do a live Q&A later on. More like a Lecture+Tutorial format.

One thing doctor, and to a lesser extent lawyers, have to do is project confidence when they may in fact not have much. A doctor/lawyer regularly has to quickly become an expert on a subject, or seem like one, often overnight but sometimes much faster than that. Briefing something you are still new to, without getting it horribly wrong, is a skill that must be developed.

I run into this in the military too. "The person to do the ethics/roe/safety/drugs/mental health brief just called in sick. Two hundred soldiers will be here at 0800 tomorrow. Read fast."