They’re going to try to intimidate and dissuade you in anyway possible.

Know your rights as a student and pass that knowledge onto your friends. It must be very overwhelming being the only one to organize, so maybe try to find likeminded people who can share the weight with you. I would try to find teachers that are in agreement with what you’re doing, along with staff and whatnot. You already have the support of students, so try to remember that. It might be time to work on some pamphlets to spread knowledge and info, I would also use it as a way to voice what’s been going on with the school admin.

I’m pretty sure they are not allowed to keep you from class.

There is no conflict to be resolved, you are exercising your freedom of speech. I think their worries are more along the lines of being responsible for the students even outside of school. From experience, the schools mostly care about the possibility of lawsuits…

edit: Also, do you have a support system? I read your previous post and you mentioned SA. From one survivor to another, I know how difficult it is, especially if you are alone. I would look for support groups near you. Im proud of you, ok?