I think maybe you took on too many goals in one go? Especially since your mental health isn’t at its best, it would be really difficult to just adopt so many major lifestyle changing and be able to follow through. I think if you take it one step at a time, really small baby steps that your mind will slowly adjust to the new changes you’re trying to add. Really, we can be our own worst enemies and that sucks but it’s not a fixed truth.
Working on your mindset will really help big time, changing your thought process, maybe reading books on change and positive mindset. Really starting from the ground up while simultaneously adding small routine changes like: “today i’ll drink this many glasses of water and i’ll write something take a few minutes to meditate”. At the end of the day, give yourself credit for that and add some more goals in the next.
Hopefully I helped if even a little, I’m on this journey myself and I’m trying to learn how to lead the life I desire. Self discipline is a huge problem so I’m taking it slow instead of rush all in because that only ends up making me lose momentum.
Good luck and good job for deciding to change, you’re already halfway there!