First off, I'm pretty much a noob with Blender. Been fighting with this thing for many hours yesterday and probably would as many today, so wanted to ask here. What is wrong with my model? I followed MANY tutorials on YouTube on how to rigify a character model, and read up on countless threads, tried literally everything I have found. The rig itself seems fine, as it is a Rigify template. When I select my mesh, then Shift-select the rig, Ctrl+P and go with Automatic Weights, it creates the vertex groups and sets the parenting accordingly. However, when I move any bone in Pose mode, absolutely nothing happens on the mesh. The tutorials make it look so simple, and I can't believe this procedure could have been so unbelievably complicated. I'm at my wits end for this one, so I'd very much appreciate if someone could take a look and identify the problem.
Here's a link to the .blend file, where I have reset the progress, leaving only the mesh and the rig (not parented).
Thank you in advance.