Yeah, sounds good.
If you made it a camaign, the first mission would be to buy a house, a car/moto etc. and get a job.
The next mission could be depending on what job you get.
I'm not sure how the others go, but if you joined the army, you'd start off with training missions, then get called to action (maybe).
Between combat missions you could spend time on base, buy coke, go to the toilet, get leave, go AWOL, that sort of stuff.
After a while you could get called to another mission.
You could work your way up the ranks depending upon how well you do in missions (have no idea how this would work, but i'm sure it's possible).
You can get kicked out of the service if you do badly on a mission.
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I know i've only coverd the military carier, but thats all i can think about (i'm a born combat lover. I love skirmish).
I can help with some mission work if you need it.