Hair Growth Remedies

I’m worried about my hair. It’s falling out. My hair is a bit layered and the longest is down to my waist now. Should I have it cut much shorter to promote hair growth? What’s the best hot oil formula can I use regularly at home? Is it good to apply warm virgin coconut oil on my scalp or olive oil

Is there any product out there that actually inhibit or atleast slows down the hair growth (underarms, legs, etc.). Please don’t suggest laser hair removal and etc. its too expensive . Im looking for a cream or a lotion?