Tips for Hair Please!!!

So lately, I've been having problems with my body and whatnot. I guess it's probably stress of some sort or me being anxious about school stuff. I also have been sleeping around three to five. {×⁠_×} I'm having MASSIVE hair falls, and I'm scared that my face is going to start breaking out too. I know this isn't the place to ask advice, but, hopefully, someone can give me tips. My hair had been falling out for more than a month actually… so, yeah. I can see it thinning, especially when I part my hair or look at the sides. I also picked up an old habit of mine—picking my hair on a specific area. I thought cutting it shorter would help or something, I don't know whyy. I have chopped off at least six inches off of my hair. My hair looks so fugly right now, but I'm in the middle of growing out my curls… waves? {O⁠_⁠o} Any haircare tips? • Should I use hair oils? Hair growth serums? What ingredients should I look for in a product? And since my hair looks lowkey bad, any haircut ideas that I can just DIY? • My hair is mostly straight, but a bit of wave at the top that is barely visible. Ik, it sounds odd. “Why?” Permanently straightened it before. No worries, if it sucked… I could just curl it. I'm going to use heatless curls so I don't have to fry my hair and spend more money for heat protection. This is so long! Thank you so much for reading all this, stranger. Carry on with your day… or night, and have a blessed day!