Continue to study and learn new skills.
Acting isn't a singular profession, it is a collaborate profession.
Regarding 'Ferris Bueller,' I was in the Czech Republic once, in Prague, making a movie at the same time as Jeffrey Jones, who played the principal, who was making a different movie. The Super Bowl was going to be playing at this bar at midnight, so we decided we would go watch the Super Bowl at this bar at midnight in Prague together.
Don't stink up the place with bad acting, if an opportunity comes your way.
I had to give myself permission to act, then others agreed.
Self-doubt kills talent.
John Hughes loved improvisers.