Do I go back to school and accumulate more student loan debt?

I’m 35 and I’m currently making $21 an hour. I have debts but not totaling more than 44k including the 23k in student loans. I’ve thought about being a nurse but at the earliest I’ll be about 40-41 before finally finishing school. School with cost probably 2x more than my previous college I’m guessing to become a qualified nurse school is somewhere around 25k-35k. Do I actually go back to school and get deeper in the hole in order to make $5-$15hr more per hour? On the upside going back to school means my current student loans would be deferred. Not sure what to do. I don’t regret my previous schooling I’d be likely stuck under $18 per hour had I not done some schooling but is it worth it.