My plugin won't load in on server

I'm very very new at this, so I apologize for any dumb mistakes I probably have made

I want to set the attribute follow range of spawned entity to 100, and i have created this code so far, it doesn't show any errors, but when I put the plugin in the server plugin folder, it still doesn't load

This is my main class:

Code:

package me.Northical.creatureFollowRange;

import org.bukkit.Bukkit;
import org.bukkit.plugin.java.JavaPlugin;

public class Main extends JavaPlugin{


    public void onEnable()
    {
        Bukkit.getPluginManager().registerEvents(new SpawnEvent(), this);
        this.getServer().getConsoleSender().sendMessage("[CREATURESPAWN] NORTHCIAL HAS ENABLED THIS!");
    }

    public void onDisable()
    {
  
    }


}

and this is my SpawnEvent class:

Code:

package me.Northical.creatureFollowRange;

import org.bukkit.craftbukkit.v1_8_R3.entity.CraftLivingEntity;
import org.bukkit.entity.LivingEntity;
import org.bukkit.event.EventHandler;
import org.bukkit.event.EventPriority;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.CreatureSpawnEvent;

import net.minecraft.server.v1_8_R3.AttributeInstance;
import net.minecraft.server.v1_8_R3.EntityInsentient;
import net.minecraft.server.v1_8_R3.EntityLiving;
import net.minecraft.server.v1_8_R3.GenericAttributes;

public class SpawnEvent implements Listener{

    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
    public void onCreatureSpawn(CreatureSpawnEvent event) {
  
        LivingEntity entity = event.getEntity();
        AttributeInstance attributes = ((EntityInsentient)((CraftLivingEntity)entity).getHandle()).getAttributeInstance(GenericAttributes.FOLLOW_RANGE);
        attributes.setValue(100);
    }
}

And this is my plugin.yml file:

Code:

main: me.Northical.creatureFollowRange.main
name: CreatureFollowRange
version: 1.0

Additional info:
Plugin.yml is where it's supposed to be.
Again i'm new, be gentle please

 

You spelled "Main" with a lower case 'm' in you plugin.yml.

 

I still can't get it to work, I think I gotta go back to Youtube videos :/
But thanks for your time

 

Hopefully you are watching good ones. Many promote bad practices. If the vids don't help: did you fix the plugin.yml per pixelrider's suggestion? If so and it still doesn't work, any errors in console?