Rig made with Rigify doesnt moves mesh

Support Animation and Rigging
1

I want to create a videogame. I have little experience with Blender, but I wanted to learn it anyway, so I started my project with this. I am trying to make one of the enemy character, but I have ran into a problem: i made the armature and the rig using rigify, but the rig simply doesnt wants to move the mesh for some reason. I already watched like 6 tutorials, read 4 posts, and tried to figure it out for 8 hours straight - without finding a solution.
I would really much appreciate if somebody could help me.

Here is the file: https://drive.google.com/file/d/1OBUCYLEpnGJ30GGlGZ-0ZRdEslt1hnzu/view?usp=sharing

I downloaded the model i am using as my mesh from the internet, so I hope the problem isnt the mesh itself.

2

Well you have parented the armature to the mesh as an object. That won’t work. Plus your mesh is not ready for Blender. Here is a little video I made for you. Hope it helps. Pardon the bad audio, my mike messed up.
https://drive.google.com/file/d/1NWt9yTluZQh9_v_wErmGGn6edPhbmGsL/view?usp=sharing

Welcome to the forum!