Tips for managing fatigue and mental health

TLDR: mental health and disorganization seriously affecting job performance, need tips

I've been working from home for the past 7 months. The position is 100% remote and it's a call-based job with daily, weekly and monthly call goals.

Since I started working there I've had issues with maintaining a routine and structure, which made me worried but I was very disorganized and couldn't keep a schedule despite my worries and efforts. I had been struggling with mental health and fatigue for a long time before getting this job and while working here I finally got diagnosed with depression and began taking antidepressants.

The antidepressants have improved my mood somewhat, but I still struggle keeping a routine and feeling extremely tired and dreading clocking in to work. My supervisors have been nothing but understanding even though this has been affecting my performance and I'm worried this leads to me being fired. I'm aware there are a lot of factors relating to the tiredness/disorganization/mental health issues (diet, sleep quality, family issues, working and studying at the same time). I've been doing my best to improve on those, but I'm desperate for tips to manage these things while I work on the root causes.