Im reporting harassment at school and I want tips

a few of my ex-friends have been harassing me at school. they make fun of me and and have spread a lot of rumours about me. They went as far as following me around during school while calling names. They insult me publicly and they refer to me with multiple insults.

Bully isn't a strong enough word for how badly they tried to harass me and ruin my life.

I felt isolated and I lost a lot of confidence and even struggled to focus in classes because of that. I felt increasingly unsafe in my own school and I feel like no one cares for me at some points. I still have friends but most of them do not directly know about how bad the bullying was. I managed to stay out of all the classes we had in common but I still feel fear sometimes.

I am planning on writing a whole document accounting the experience of how they bullied me, isolated me, and tried to ruin my friendships. They used to loudly laugh at me and even subtly isolated people who befriended me. They did everything to get rid of all my friends - Not only that, my mental health got terrible. I stopped paying attention in class, started skipping ( just to avoid them) and let go of my routines.

I want to report tomorrow and hand over the document, but im scared this might lead to some people hating on me. Usually our school has a strong anti bullying policy and NO ONE ever gets away with it. but still a part of me is worried if this is a bad social move. But I suppose thats not too important to care about. The right people would understand.

Another thing, if I should report, is there any specific things I should mention in the document (im already mentioning their full names, the exepreicne and how it impacted my mental health, studies and other small things that actually make up for big things.) I was wondering if any of you have any advice on how to go about it?