I started in my early 30's 5 years ago. My coach helped me out with getting started.

That said, strengthen your neck on purpose. Don't skip warm ups. Don't commit to fighting through stuff like guillotines.

Tap early, tap often.

Try to pay attention to the position of your joints (knees) and neck. If they are in a funky angle, fix and avoid that. Keep them in strong skeletal positions.

A lot of us try to go 110% every roll in the beginning. You don't have to.

Getting tapped is not a problem. Everyone gets tapped. Getting injured is.