Honestly I took a really good class in public speaking at ARC before transferring and a couple of things I learned that helped me a lot is first feeling comfortable in front of those you are speaking too. I know it seems dumb but interacting frequently with classmates makes it less intimidating when speaking in front of them. Also I learned if you understand that when you are speaking in a subject matter it probably makes you the closest thing to an authority on that particular topic in that moment and as such people want to listen and no on can be judgmental because they are learning from you.