How do I handle a long gap on my résumé? (Nashville)

I took time out to care for a family member after working as a hotel front-desk agent. 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?

Thanks for writing this out. I went through something close to it 11 months ago, and it got easier once I kept a simple log of every call and form.