Mods for Minecraft RPG Server (Warrior Cats)?

I need some good mod tips that are as easy to use as possible. The map etc is available. Of course everything is very sporadic from the technical point of view.

My imagination:

Change nickname
"different" chats and colors for the chats for the clans
maybe with radius the chats
"Groupings"
Kits
Notifications when limit is exceeded

If you have any idea about mods etc and you feel like you have a project, you can also contact me.

If you just want to go on it, you can also contact me.

For this you need mostly Plugins because I do not know so well with it you could watch a Youtube tutorial