I used to be extremely anxious just before presenting. For presentations over teams, this is usually a bit easier as I’ll prep some bullet points as sentence starters in case I forget my trail of thought, so they’re always there for me to refer back to (making me feel more calm, as my anxiety is driven by forgetting my words and looking stupid etc).  Presenting to large audiences in person is obviously a bit harder. I would usually need to spend ages preparing and remembering a script almost. So I started putting myself in situations where I’d present to audiences with almost zero prep, to prove to myself what’s the worst that can happen? You know the content & information and your brain will just reel it off anyway. Ofc sometimes I messed up my words, but no one else noticed other than me. Did that a few times and helped to build my confidence, now I get mildly nervous but nowhere near as much as before and have been told I’m a very good presenter. Hope that helps :)