How do I handle a long gap on my résumé?, data-entry clerk here

My résumé shows a gap from a layoff and some health issues. I have been trying to stay organised about it. I am not sure how much to explain. Did anyone get past it?

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.

I listed the volunteering and course under the same dates and kept the explanation to a sentence in the cover letter.