[Question] How do I use scripts?

Hi everyone! I hope someone can help me with this.

I wanted that my server had instances and mobs that work. For example, mobs dont use spells, they just hit and nothing more, also, the encounter with Illidan is bugged, Akama doesn't open the door.

These are just some of my problems, so I hope someone can tell how to fix them.

I noticed that you have files that fix these events, however I don't know how to use them.