If I remember correctly pro pay starts once you have a nuke NEC. Right now you are either 3365 or 3385, which are both nuke NEC's. That means you might start seeing that money right quick. I don't remember how sub pay worked, but you'll get back pay once sub pay starts (going all the way back to the day you volunteered subs).
Congratulations on your selection as ELT. Welcome to the community.