I was in a similar situation - had a high paying job in corporate finance when my life imploded due to mental health and addiction issues. Was unemployed and honestly not well enough to work for a long time. I got on provincial disability insurance, which let me survive. Once I felt well enough to do something, I started with volunteering, which gave me structure, and something current to put on my resume and a current reference. That volunteering led directly to my current job, working on a telephone mental health support line as a peer support worker. Definitely not as much money as I'd made in finance but I like the job,

Something to consider is maybe doing some career exploration with an employment councillor. Not sure how things work in the US but where I am some non profits have employment counsellors that will work with people on figuring out what kinds of jobs they could do and what if any retraining might be necessary.

Good luck.