When should I resign? Can I lose my license?

Hi everyone, new grad here. I graduated in May of 2020. For personal reasons, I desperately needed a job, and despite a lot of misgivings about it, I took a job as a pediatric private duty nurse. I had one day of online training, one day of simulation training, and two days following a nurse. There have been a lot of times when I've gotten uncomfortable about something (mostly about how to chart something or what to do in certain situations) and tried to contact my supervisor but she never answered me so I've just muddled along as best I could with the resources I could find on the internet and the research I've done personally. I have proof I tried to contact her though, as I've sent everything through email. 

Since I've been so uncomfortable, I kept looking for another job, and finally got a job at a nurse residency. I can work for four more weeks. When and how should I send my resignation?

Another thing that makes the private duty job difficult is that the mom speaks Spanish, I do not, and I don't always have an interpreter handy. Last week, we went to the doctor's office, where we discovered that the feeding orders on the patient's chart on my charting software (Kantime)were different from what the doctor ordered. The doctor was very upset with the agency, and since I had been taking notes on my phone, was also upset with me. So far, whenever the mom has done something different, I've done it while charting that I've done it "per mom's request" especially since I didn't think anything of increasing the rate of the feeding from 350ml/hr to 360ml/hr. This is what the nurse who trained me told me to do as well, and I thought it was just another difference between textbook and the real world. I'm discovering that that was an awful idea and that I should have made mom do anything different she wanted to do. I'm doing that now, but I'm now terrified that either the supervisor or the doctor will complain about me to the BON and I'll lose my license, or that the mom will become upset that I'm quitting and complain about me. What do you guys think?