You did it correctly. We just list for non rev in the back and the gate agent will usually have a boarding pass waiting for you at the gate if you checked in. If there's no seats they'll give you the jumpseat form to fill out when you get there. Non rev prioirty is time of check in within your group(s4). Jumpseat is by seniority so no need to get there super early. If you still have questions ask AO when you get there