Thank you so much! I know that it's a really difficult thing... but I want to be as supportive as I can since my upbringing didn't really involve much of an example of being supported. I texted him right before the event started (and tried calling but he later said he was busy helping with setting up), and said that he was going to do great, that I believed him him and would be there for him. And then called him right after and he said it went well; he was happy about how it turned out, and he was proud that he was able to improvise a joke and got some laughs! I was really happy for him. :) Thank you so much for your advice!