They offer monthly trainings/meetings, and last I knew, they expected you to attend at least 5 a year to be considered an active volunteer, although COVID may have changed that.

For other events, it's usually an "if you can help, it would be appreciated" setup.

If you have the time to participate in the CERT training that's coming up, it's worth it. It's a good intro to some of the ways you can be helpful. If I had time this spring to attend again, I would - it's a great experience.