it will be better Gustav, the 1st week is the toughest week and you just completed it, the next days will be better.
regarding the depression and focus, I still have those from time to time.
there is something that will help, I new about it long ago but never try it, I think I will give it a test in the next week.
search for dopamine fasting, and I recommend you reading the book „dopamine nation”.
it seams addiction will cause a dopamine depletion so we can’t enjoy the small things and be motivated to do it, but if we do dopamine fasting we will back to enjoy the small stuff and be motivated to do it.