G'day, Turquoisesea! I'm glad things are moving forward for you. The following stood out to me largely due to personal experience:
Quality sleep is important. Investment here will pay big dividends.

In view of the paralyzing effects of becoming overwhelmed (something I know too well in my own struggle with depression), I feel you would increase your chances of successfully reintegrating in school and completing your course if you find a way not to work while studying. Seeking financial aid assistance and possibly securing student loans or even grants would be worth the effort and debt in the long run. Graduating and establishing a career will enable you to erase that debt faster than you might think.

In short, attempt to reduce your challenges / distractions / annoyances as much as possible in returning to school.

Wishing you success and happiness!