Since you're on Medicare make sure you're new MAGI doesn't increase your premiums for Part B and Part D. If you have a nice income that's at the top of the limit before being charged a higher premium, it might be best to do charity work for free (i.e. I'll probably volunteer more at my church).
https://libertymedicare.com/blog/medicare-part-d-part-b-premiums-by-income/
Based on “Earned Income”. So— start a businesss with profit and loss Sched C. Doing something one has always wanted to do.
In Cat Mom’s case— she is talking about a nursing position part time— better to hire on as an independent contractor- not subject to wage and hour. Contract. Independent. Deduct expenses against this income source.