Hey! So that is so nerve wrecking.. I know it can be so intimidating in front of all those people, and I don't know the answer but a few tips would be to: not look down when you have to say your name or a bit about yourself..people may mistake this for shyness..eye contact is so important! Maybe try using your hands when your talking, (I'm trying to do this more myself) this can seem as if you are confident and people tend to listen more, try be assertive when talking and when introducing yourself maybe try to smile and look around room..(also have you ever tried voluntary stammering?) But don't worry we always think people are thinking what the hell if we are stammering..more often than not people just care about themselves and how they present themselves too..ye are all in the same boat! Everyone wants to make a good impression. Also if you are going to be with them for the next few months ye will know each other inside out..you will get comfortable and the stammer won't seem as bad. It's always worse initially. Don't worry about the first impression too much, people will get to know you as you really are! People dont (shouldn't) care if you have a stammer, if they do then that's their own issues/problems! Also it's college and 2019, people should be open-minded and probably more aware! Iv gone through this in my four years of college, I just need to remember to slow down..do my breathing and try not to give half a shit of how I sounded cause I have this and it's not going to go!(still working on this..!)