The first weeks are always the worst. Seems like ur stammer ain't as bad as mine was. Ragging was definitely the worst part, i hope that is prohibited at ur uni. Well my strategy was to get a friend early on and have them introduce me when a teacher asks(my stammer is way worse so i was terrified). Didn't work out so well as he didn't chime in for me. Well he was being nice coz u dont wanna interrupt a stammerer but i was hoping for him to 😂. So i missed some first classes afterwards :3. As u can keep up a convo etc I'd certainly tell u to do the intros yourself. Maybe if u get more confidence you'd get better at it, as u said u don't stammer much when youre calm.