[REQUEST or HELP] Rigging Caroline from Portal 2

I have made a model for the character Caroline from portal 2 and intend to rig her to use as a ragdoll to pose in Gmod, and as a ragdoll and npc in my portal mod I’m making. I need to get her to have facial animations so I can properly faceposer her, but the issue is, I have no idea how and I can’t find much on google about it that isn’t extremely vague.

image for reference:

if anyone here would be able to make her have a posable face - at least facial expressions like smiling and blinking and stuff, lipsync wouldn’t be completely necessary in the way I’d be using it, that would be an amazing help as well.

Thanks for reading