You can attend a local American Legion meeting, introduce yourself. The information is online. The local Legion Post component is up to you and the local Post is who would ‘sponsor’ an applicant.
They ‘sponsor’ candidates for the Boys State program. The Ladies Auxillary does the same for Girls State.
Also, I know I mention it ad nauseam but check out the American Legion Oratorical contest. Our son entered and placed at the state level for three years. Great relationships built with the local post members, excellent experience with public speaking, and super cool scholarship money.
I am now a judge for the event each year and love participating in it.