Learn Everything You can about Your Profession
Serena Williams can confidently swing a racket. Chef Gordon Ramsey can confidently cook a delicious steak. Like those two legends, the coworker you admire who’s always suave and confident in meetings knows what they are doing because they took the time to study their field.
I know knowing everything in your field is a tall order, one that’ll take years to accomplish so work on this little by little. Sign-up for a course related to your job, read a book or find a mentor to show you the ropes.