Who should I tell about my commitment to missions?

Since the teachers and prophets of the local church in Antioch in Acts 13:1-4 were over Paul and Barnabas and they were serving in the local church (Acts 11:26) first, for over a year, and they prayed together, worshiped together, and fasted together there in Acts 13:1-4, you should tell your pastors/elders/church leaders and share your vision with them and seek to get their prayers and counsel about your commitment and convictions for missions.