It takes time to build up your traffic (I have written some tips about increasing traffic). However, only after 6 months did I start to show a few cents trickling in ... even now it still hasn't reached large amounts. I believe it will take a good year or two to get to a level where you are earning a reasonably amount, but only if you keep writing and marketing. Realistically you need to have a decent amount of hubs (say 100 or more) and traffic of at least 200+ views per day (preferably much more if possible).
Don't do it just for the money, enjoy the experience! Hubpages is fun and some money should come in eventually :-)