How do I handle a long gap on my résumé? - first time posting

I took time out to care for a family member after working as a call-centre agent. I have been trying to stay organised about it. I have done some volunteering and a course during that time. How did you handle it on your résumé?

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

Keep your skills fresh and mention anything recent. It shows momentum.