What happens next?

How to start a school defenders group
Understand what it is.
A defenders group is a group of people who have a duty to help and support someone going through bullying by giving advice and providing a safe space away from bullies.
Speak to your head teacher about it.
Your head teacher can help you organize it and they will have a better knowledge of the school and how to do it. Come up for a name for your defenders group.