Take small steps. You don’t have to raise your hand for every question initially but build up to it. Make a goal or speaking challenge that you’ll speak up 1x a week or 1x a day. Then build it up to 2x a day. Then 1x a class. Etc. Everyone has something they are embarrassed of whether it’s their speech, their hair, how they walk, etc. we all have insecurities. The important thing is to accept yourself (doesn’t mean you have to like your stutter). Know that whether or not you stutter in something, that you still deserve to be heard as much as anyone else. Best thing that can happen is you get the sentence out and no one makes a comment. Worst thing that can happen is you get the sentence out and someone makes a rude comment or joke about it. But that’s true of literally anything in life. Make a plan of what your worst fear is and if that happens, what can you do to get past it. It’s ok to be upset or scared. What matters is how you respond to it. This something one of my friends did and they said it was the best thing they ever did for themselves. They asked their teacher if they could give a short 5 minute presentation on what stuttering is and what is helpful for them when they stutter (ex- don’t finish my sentence, don’t copy my stutter back to me, etc) and it gave them the freedom to talk freely because now there was no pressure to hide their stutter anymore.