Online class

Online class Hi, I would like you to help me. (I'm using google translator, sorry if you don't understand some part) I got a job and for the next four months I will be taking online classes to prepare, and I'm really nervous about it because I have to interact with them and present seminars, every day I'm getting really bad, I have anxiety attacks, I lose my appetite. I wanted a tip on how to present my seminars and speak confidently and confidently in class. Thanks!