What worked for me is getting a job through federal work study. it's not much money, but working for the college means they are flexible with your schedule. I ended up in a department that needed me regardless of financial aid funding, so when that money ran out, I still had a job.
Substitute for schools. You don't need a degree, because aides need subs as well as teachers. Subbing means you pick the days you are available.
Agencies are similar, whether healthcare or temp job. You let them know when you are available and they will try to match work with you.
Any job that you are helping others will look good when it's time to search for RN work.