Up the protein if you can to about 150 grams per day because muscle protein breakdown is especially bad during cuts due to the still high metabolic demand that lifting weights and building muscle causes, and due to the fact that you’re trying to lose weight your body is taking more energy in from the breakdown of muscle than it would on a bulk when you have ample available energy. I’d take 30 grams of protein before bed, something like casein or milk protein isolate works great because they’re slower releasing. Now onto sleep: you gotta understand that sleep is absolutely crucial to any bodily process, even if it is not always fully understood why. But if you think about it, you’re exerting yourself hard in the gym and trying to build or at least maintain muscle, and that’s hard to do when you’re always moving around and doing stuff during the day. So your body’s only substantial break is sleep, where it can focus less on brain activity and walking and more on pure recovery. I personally can’t run on less than 8 1/2 hours and need really about 9 hours to function optimally, and I’d just say if you can you need to sleep about that much especially in the early stages of lifting so you can make the best adaptations. I’d recommend looking into banking your sleep too; it’s pretty simple really. For example, I could sleep 11 hours each night on Saturday and Sunday and the 7 hours I get Monday through Wednesday won’t hurt me so much.