HOW TO BE EXTROVERTED?

I’m taking a course, and the people there are so nice! I really like them, but I just can’t talk to them. I love this course because it helps me forget about the terrible school I go to... Everyone has treated me kindly and even said a few things to me, but I just can’t start a conversation to really get closer to them.

I truly want to  I even come up with ideas of what to say .. but I just can’t get the words out. Nothing comes out of my mouth, and if I try, I know I’ll probably stutter or forget everything.