Hello, dont worry about life here in qatar, about the whole westerner thing. You'll find that you are not alone in doha, because theres all sorts of cultures and nationalites here. And like every country in the world u have the good people and the bad. Its not that likely that you will be harrassed for being a westerner here. I have never herd of it here in doha. And as for the money, well what ive herd is any job here should pay more then its equivalant in most places in the world.

Qatar is very safe, and friendly. You'll easily get used to the country. Inshalah you'll find the money good.
Good Luck !