Practice Makes Perfect
If you’re new to video meetings, then practice first. Set up your lighting and audio, and once you’re happy with it, call a friend and find out how things look from the other end. It’s much better for a friend to complain about bad sound quality than that important client.
But the most important thing when you’re on a video call, is to relax and present the best view of yourself that you can and let the work show for itself.