SERVER IDEA

Hello everyone! This is Riza here!
This is my very first project that I want to share with you guys here in Planet Minecraft.
The project is to build a RPG (role-playing-game) server featuring almost pure Minecraft gameplay.
This will be a pretty big project and I don't know if it is going to work out, anyway, here's the idea:
Background Story and Players' Objective:
Many years ago the first Minecraftians found this wonderful place and they named it Minecraftia, they then lived there for hundreds of years in harmony. Until one night, the evil forces in the two demonic dimensions The End and The Nether succeed their goal and opened up a portal that monsters can now go to Minecraftia (overworld).
You (the players) are a Minecraftian summoned from different parts of Minecraftia to invaded areas and your job is to save Minecraftia by fighting the monsters until they surrender! Players first will start in a small town where monsters are less powerful and environment is much more safer, but then when players start fighting through different village and keep leveling up getting more powerful gear, monsters in those areas will be so much more difficult to fight, it is designed to force players to team up and fight through villages.
Bosses are found in different villages, it is possible for some villages with no bosses, but the only way for the players to pass through the villages with bosses is to kill it. Killing the boss will teleport the players to the next village. I am planning to use EpicBoss (plugin) for the bosses, and the players can spawn the boss by pressing a button and enter the boss dungeon.

I am not a server/ plugin expert, but i am good with thinking of ideas, this is my idea, please leave down in the comments what I can add and what plugins I do need and also what problems and difficulty are there in my idea. Thank you.