I found out that there's a pride club at my new school and I'm eager to join. The problem is that my brother is going to the same school as me and if he finds out i'm in the club then he's gonna tell my parents and out me. Should I still try joining?
Get some stuff on him or something, are your parents accepting of LGBT people and would your brother do that, no offence he doesn't sound like the best person.
I haven't been outed even though I could be at any moment but from watching coming out videos that doesn't sound nice but most of them turn out okay.
I think you should go for it you should care about what people think even if they are your family because it's your life not theirs they can tell you not to do something that isn't even bad like joining a club.
When I outed myself to my mom, I was more confident that my mom would accept me and my brothers would be weirded out. Turned out the opposite way. They defended me to my mom and then everything was fine. Maybe tell your brother first privately? Just so he doesn't just suddenly see you in the club? Write him a letter or something.
You could aways say that you are interested in seeing different clubs on campus and what they talk about.