AITA for having anxiety about going to a new school?

So I know that people are gonna be like “you’re to young to be on here”but I have real problems so suck it up,anyway I’m going into grade 7 this year after summer break and that’s a whole new school for me and I don’t know any teachers there and I have anxiety talking to people I’ve known my whole life and I’m slower in school so sometimes I talk to my friends and ask how to do that and stuff like that so my mom and I have an older brother that’s already passed grade 7 and they told me to just talk to my teachers about it but also he was saying stuff like “oh it’s gonna be fine you get to go anywhere during breaks” but that doesn’t bother me and I don’t know how to do long division so I’m also worried about that and then they got upset at me because I started crying because of my anxiety and I don’t have any ways to relieve my anxiety except for listening to music but I won’t always be able to do that so any suggestions?but anyway AITA?