I would focus on what you are grateful for *now*. I think that is the exercise here… but I also think it may be helpful for you.
Every night, I think of 3 things I am grateful for. I try to make it specific to that day. It can be big or small. For example, grateful for a beautiful day, nice chat with a friend, nice meal with spouse, a helpful doctor appt, a nice compliment received, etc. Could be as simple as being grateful for a nice cup of tea!
Best of luck for better days ahead! Reach out for help (to a friend or therapist; etc.) if you find your situation overwhelming. 👍🙏