To get to the flywheel, you have to remove the starter first anyway. Hence why begin with starter.

Its an entire clutch jobs worth of labor to do the flywheel, hence best practice to do entire clutch components while its apart. Suddenly that becomes very time consuming and expensive repair.

Once starter is removed you can see and spin the starter gear and inspect the teeth. Just looking to see if they look chewed up or not.

Then you can look into space where starter came out and see some of the flywheel teeth, and inspect those. Then you slowly rotate engine and pause to inspect next set of teeth, repeat until all flywheel teeth inspected. Rotate engine using a socket wrench on crank pulley bolt.

Warning, only ever rotate crank clockwise (crank bolt tightening direction). Otherwise you can damage valve train.