Show choir
Color Guard
Fluting
Dancing
Singing
Music
Reading
Writing
Speech
Building things
Taking things apart
Muttering to myself
Baking
Math
Science (Chem)
I would say that speaking up won't be as bad as you think, but don't force yourself to do something that would make you uncomfortable. I know a lot of my teachers have online resources to check out in case you miss stuff, maybe there's something like that?