You got balls. Good job. I found that the more I practice, to the point it’s memorized, the better I do. Give the whole presentation several times, out loud, to yourself. Then maybe invite someone to listen in. Don’t let the teacher yank someone else in. It’s good to have dome tools to lean on so you don’t feel like your on a tightrope without a net. I liked Hollins/HCRI. When I practice using their techniques rigorously before a presentation I generally fo real well.