I know how you feel, I am also 22. I have finished my degree, I did a computer science course and had a few presentations along with the big final project one. Honestly they all went terrible, but the professors understood that my presentation ability is obviously inherently outside of my control. I still finished with a 1:1, even though my presentations were awful. Sometimes, you have to just push through the fear and do things even though you really dont want to. Sometimes yes they go as terrible as you imagine, but it doesnt matter.... ​ I had a fear of job interviews, since I was a kid literally since I was 10. I wondered how on earth I would ever get a job. And yet I somehow, got a job from my first ever interview. Yes my speech was awful, but people understand they gave me more time and I could write things when I got stuck. Yes there are a lot of awful judgmental people but today most people are understanding and want to help you, the biggest thing with being a stammerer is breaking the wall of self doubt. Until you do that you can never improve. ​ You know what you want to do, so at least give it a try. Dont give up when it gets hard, yes some things are waaaaay harder for us which sucks. But dont give up