How can I realistically work full time and attend school full time?

I want be a dentist assistant but classes at one college was Mon to Saturday 8 hours , 8am to 6pm & my job night shift is 6pm to 2:30am , Saturdays off.
there’s a flex part time schedule at job but manager had denied me change to morning shift & im worried she’ll deny me change to part time. She prob hates me.
no I can’t stay at parents house for free and go to school, I’m horribly depressed at her tiny senior apt with no ac , I have no bedroom. It’s not a huge rich house like most peoples parents have. It’s not a place I’m eager come home to everyday after work.

I have $0 savings and bills pay so I can’t quit or work part time yet. I plan now to Dec save $7k. As it’s been difficult for me to save. But I need and want start school and also get my own studio or room for rent to focus on my school & hobbies.

How can I realistically work full time and attend school full time?
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