Why did your character join the RAC? To prove to everyone that he could make something of himself even if he's a string bean and not all badass like his alpha male family.
What might they be doing now if they hadn't joined? Probably still miserable and being beaten up on Callisto, tbh.
When they picture their future, what do they see? Marriage and kids with a certain redhead, like that's the dream, Captain of his own ship, respected and beloved by all, might as well dream big.