There are lots of gas station and restaurant Nepali workers in the USA but not all of us work in gas station and restaurants. there are actually lots of happy professional and business owners but i guess they are not as loud as the others of us who like complain all the time.
however, the point is not what kind of job you have , but whether you are pride on doing that job or not. say, you're working in a gas station 18 hrs. but you're earning around 3000 a month and either saving the money or investing in school. you should take pride on your hard work , not go around crying about it.yes it definitely sucks to work so many hours but again you're spending that money on US college which is a big thing for even US citizens and majority of them can't afford. or you're saving that hard earned money for rainy days or buying properties back in Nepal. which was not possible in Nepal. so be proud, be happy that you're being productive for yourself.
Slaves were forced to work. they had no choice. you have a choice. you can always quite your job. if status is going to be problem you can always go home where you already are a citizen. plus you have human and other civil rights even when you're not working legally.