You have either found this place as I may have directed you to it or you were eagle eyed enough to spot the love and click it!
My health journey was motivated partly from a difficult time. If you think you're alone, you're not. Here are some of the things I started doing when I didn't know what else to do - all I knew was I wanted to feel better and I was willing to try.
[This is not medical or coaching advice. Just my own notes I'm sharing in hope they'll help you too]
Make a list of things you do & people you see. Assign a colour for how you feel before, during and after (traffic light system).
Try to do mostly green (where possible)
Take a mental break from your own struggles and try to help another person who deserves it. A small act. We all need help and so do others too.
I can't emphasise enough the benefit just moving a little bit more, sleeping better and eating better did for my health. Nothing intense. What you already know is more than enough to get started. Start small and see how it goes. Remember actions lead feelings and not the other way around. I wish you well.