Does weight paint work? (Screams in Blender)

So, I’ve been working through the process of making a rig and I have one that functions. It’s modeled, has textures, but now I"m trying to pose it and that is proving to be a nightmare. I used rigify and auto weighted it, and go figure I needed to touch it up. But, right off the bat when I went to see where the weights were all the bones were either purple or blank, painting doesn’t influence anything, and there’s this annoying thing where if I want to select something I have to press “m”, select the tweak icon, press “m” again, then pick something. Long story short am I doing something wrong? Please send help.

Maybe this helps.
https://www.google.se/amp/s/odederell3d.blog/2019/12/12/blender-2-8-select-bones-in-weight-paint-mode/amp/

Screenshots of your work, .blend will help you to get help quicker, specially with weight painting many things can get wrong.

Okay, I figured out part of it. I was painting the wrong bones, it’s the DEF- ones not everything else (OBJ data tab → vertex groups). However, the clothes are still giving me a headache, along with these freak vertices that refuse to be unpainted.