Part time jobs are a lot easier to find, I'm looking for a part time job to supplement my pension. So far I have been offered work in a care home or a restaurant kitchen washing up. I would just leave your present employers alone, you want to leave on reasonable terms if you want a decent reference.
Is there a job agency near you, that's how I got work after being made redundant at the age of 58. No one was interested until I asked at an agency, they said there was more work than people to do it as long as you don't mind what you do.