Hair isn't on models head? And ATTACHED clothes are doing their own thing?

This is my first time making a model, so bear with me. The hair isn’t on the head?? It just floats to the side?? And the clothes that are apart of the body are kinda just doing their own thing?? God why did I ever do this

heres how it looks in unity as well



Looks like stuff isn’t attached to the skeleton. Like for hair, you could parent it on the head bone, but for the outfit, might need to merge armatures (bone setups!)