Help please!

Hi everyone, I am super new to coding and it makes me feel so stupid. But I have followed a super good tutorial on Zombie movement, but there is one part missing that I really want help with, a wander state.

This is my current script - https://paste.myst.rs/hoz7c6uu right now when I come in range the zombies just walk in place.

I want something like this -
- when in wander state
- generate a new random position for the AI to head towards
- have AI move to new random position
- when arrived at random position
- decide to wander again, or be idle.

I kinda just want a complete script, but I also want to learn. I am in a discord group but I feel like such a burden becuse I'm such a beginner at this, someone please help!

And please, explaine like I'm five, with half a brain.