Giving a name to it

So I've read the instructions on how to go about this experiment and I think that I'm going to try it.

My first fear/anxiety is that everyone will think I'm illiterate
When I mess up on one word or if I can get my point across fast enough or If i can't say what I was thinking of, Also I feel like when I say something, that's it's not truly thought out because if the teacher counters with a question I'm usually stuck on how to answer it and I didn't think of the possible questions that she would ask. That's one and a half of reason why I don't really participate in huge group discussions because I feel as if there are expectations already made when someone get's called on.

Second fear: Probably standing alone

Like the other day when we had class, everyone loved the book so much and said such great things about it while I sat there just hating the book and not really saying it. Like I understand that everyone has a different view of things but it's pretty awkward disagreeing with the whole class, plus I guess I'm not a big fan of controversy. With what I believe in is different though because I don't really care if I stand alone or not because It's what I'm passionate about and what I truly believe.

Those are my main two fears/anxieties as to why I don't voice my opinion very often, Hopefully I will learn to get over them or at least face them, Maybe I have to start writing down my thoughts before I say them so I can have some materialistic to look to when I forget a main point in my thoughts or just suck it up. I've tried ignoring my fears but that doesn't really help when they just appear back in your thoughts, haunting you while you speak aloud.