You need to speak with your local chapter or city director, or Regional director. There are opportunities to be a mentor, advisor, chavrusa, etc.
Expect that you may need to provide a criminal background check, references from a Rabbi or leader in the community, or other communities if you are new in town.
Experience working with youth is useful, obviously.
Advisors/mentors/chavrusas range from B’nei Akiva to YU to Yeshivish/chassidish hashkafos.