It's my first time trying to rig a hand I created. I've set an armature in the hand, selected the hand first, then the armature, hit Ctrl + P and selected Armature Deform > With Automatic Weights. Based on the tutorial I followed to do this, it should've worked but when I go into pose mode, the hand doesn't bend with the bones. Can someone please help out?
The tutorial I followed for this: https://www.youtube.com/watch?v=KpokgpH1VvE
The blender file can be found here: https://drive.google.com/file/d/1yAz-vNTVgaiTC0DXteNm53078JF3_0s8/view?usp=sharing
I'm new to Blender, so to anyone answering: Would be kind enough to explain it in super-layman terms, please? Thank you!