Well, I’ve never used it myself, but given that you made it through half the presentation successfully, I think it would be worth trying propranolol to help calm your nerves. That little extra help could be all you need to pull you through the last half. And if you think practicing beforehand with strangers might help, feel free to DM me for a Zoom call. Even better, do a Zoom practice call while on propranolol to build your confidence beforehand. I’m sure that a few people on here would be more than happy to volunteer to be your test audience.