ULPT Request -- what's the best way to use maternity leave before quitting?

I want to have a baby prior to leaving a job so that I can still have benefits and maternity benefits (if there are any, im not sure). what is the best way to go on maternity leave to get the most out of it, then quit the job? my job is high stress, and physically demanding. I am exhausted all the time, there is no time for sleep/eat/vacation. what can I do with the benefits that I have now, go on maternity leave, then quit the job?