This is the best advice. A high end mirror less camera will help a bit with its higher dynamic range, but simply optimizing your lighting will do wonders for any camera setup. All of the people showing beautiful mirrorless webcam shots have already optimized their lighting, so start there first.

Also, don’t be the person with the overly-complicated webcam setup who ends up delaying every other meeting while they fiddle with cables, tripods, camera batteries, overheating cameras, cameras going into standby and so on. Having crisp images doesn’t matter if your always late or frazzled because you had to tend to your perfect webcam setup.