I used automatic weight paint first then realized I need to fix hips part so I've been weight painting manually. however it looks really messed up when I move the model.... is
Blender 2.8/2.9: Changes in Weight Paint Mode (AGAIN 😡) - X Mirror / Mirror Vertex Groups - YouTube
Weight Painting - Left Foot's Weights are effecting right shoulder - Ask - GameDev.tv
How to weight paint in Blender - Artisticrender.com