To apply as a coaching candidate you will have to log into your family profile account in the registration system.  Next to your name there will be a button "Register as a Coach", click the button and you will registered as a coaching applicant for that specific sport for the upcoming season in which registration is open.  If you are selected as a coach, your division commissioner will assign you to your team.  Additionally, if you are selected as a coach you will be required to go through a background check and may be required to complete select training courses or clinics.

Instruction for registering as a coach

Coaches Application