How do I handle a long gap on my résumé? - 9 months and counting

I have been out of work for 9 months and worry about the gap. This is my first time dealing with any of this. I have done some volunteering and a course during that time. What do you say in interviews?

Keep everything in writing and save the confirmation numbers. It saved me later.

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