system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] What do people on Tatooine do for work?

According to the Old Republic there's a bit of a neat cycle with Tatooine, a corporation will find out it's lousy with metal and set up a neat little mining operation, then it turns out that the metal is all messed up and rusts so easy it's worthless for any serious use, then the corporation gives up and leaves leaving the planet to the Jawas and sand people, skip forward 80-100 years later and another corporation finds out about this little planet in the outer rim with huge metal deposits...  


By the time of Clone Wars or the Galactic Civil War what were people doing on Tatooine? Luke was a moisture farmer but was it economically viable to try to squeeze drops of water out of the atmosphere when literal ocean worlds exist? Naboo should be filthy rich if a little tap water is that valuable.
gpt
It is about transport. It costs credits to transport water across the galaxy not to mention dangerous. Probably not profitable. SW seems to have abundant energy and on a planet like Tatoonie with a limited resource like water, it is more economically viable to harvest water than transport it. 

To answer your larger question, jobs. There are doctors, bureaucrats, musicians, bartenders, taxi drivers, bounty hunters, etc. it is likely that you end up doing what your father was doing given the lack of visible social systems. Or you could join the Imperial Academy. It is after all a free ticket off planet and much easier than spending the harvest or teleporting yourself off this rock.