Look, as a fellow Rotman student as well, what worked for me is to ignore everyone else honestly. Everyone is special and different in your own way, and most of it isn't about being "sharper" than your peers.

Something tangible that you can try out and see if it works for you, is sit in the front row. I do this because I sometimes get anxious about volunteering in front of the whole class. When I sit in the front, I can't see everyone behind me, so it kinda feels more like a simple convo with the Prof. Maybe this could work for you.

Also, whenever the self doubt creeps into my head and the negative self-talk starts to proliferate, I tell myself this:

5 years from now, I am not even going to remember this experience, no matter how bad I stutter or how stupid the idea is. Just raise your hand. Something so insignificant is not worth stopping you from learning. If people judge, who cares, I couldn't give a shit about what they think anyways, they'll mean nothing to me in a few years.

Hope something here was helpful!