You'd need to schedule and take an exam. There are lots of resources online to help you study. I recommend the Youtube video from Tony and Chelsea Northrup.

I'm not sure how saturated it would be. My advice would be to contact the closest FD (or PD if you wanted to go the SAR route) and ask. If they say they're covered, ask if they know any other stations that could use a hand. There's bound to be a department that needs volunteers.

The FD should have an enterprise level DJI (or equivalent) with color and IR cameras but it will probably depend on how well funded the department is. SAR may be a different story as far as equipment but I don't know since that's not the route I pursued.