How is farz ghusl done exactly?

This has been on my mind for a while and I have looked at several explanations but I’m still confused. Are we supposed to wash our private parts first and then the whole body once? Or are we not allowed to touch it during ghusl? Sometimes I am under difficult circumstances and I can’t do the sunnah but I really don’t know how the shorter version works. I would appreciate it if someone could tell me EXACTLY what to do just for farz. Also, not sure if it’s important to know for this but I’m female.