I'm throwing in the towel; Thanks for all the help

I was supposed to start my new job Monday, but I think I'll just let my manager know I can't take the position anymore. I didn't realize how extreme my social anxiety has gotten over the years + the pay isn't worth it. I'm currently making $3k less than what I'll make as a nurse (57k) without the responsibility of someone's life on the line. I'm remote at my current job so I can get things done with the family member I care for and actually have free time that I won't have if I take this job since I"ll need to work both to survive. I'd be working 7 days a week at about 76 hours a week. I can't do that. I'd be a bad nurse, I'm not in shape and many on the nursing subreddit mentioned how they'd never listen to a fat nurse. I'm just going throw in the towel now and consider applying if my current job ever lays me off/goes automated. This sub has been a tremendous help and I appreciate all of you all.