If you simply find your appetite to be gone, maybe it will help to exercise? This will also help with falling asleep. Remember some exercise is better than no exercise, so don’t burn yourself out going hard on your first day by getting an injury or discouraged.

For sleep I don’t have a good way to fight the REM rebound or difficulty falling aslee. IMO you should embrace the REM rebound as long as you don’t get severe nightmares or anything. It’s your body recovering from chronically low amounts of that specific phase of sleep.

If you’ve become accustomed to taking large amounts of cannabis to get “in the zone” you might want to try taking a large dose of caffeine instead. What’s large for you may depend on your tolerance. My tolerance is decently high and I would consider 300mg enough for this.

I’ve gone through this a couple times and it’s not that bad. The worst is the difficulty falling asleep which only takes a few days to fix, and the CHS which only lasts a couple days. The brain fog takes a while to fix though