I Want to Have Many Careers

I saw my partners work hours and he's got long hours and I feel jealous, but also go into a state of depression, I love photography, but it requires another job on the side to help. I've got a casual job, but I only manage to get just over 3 hours of work from it each shift, so lets say about 9 hours a week and I certainly want more!!!! I'm hoping to go talk to the managers, but I'd say there won't be any luck, I want to be able to have a fulltime job so I can save!!!! I'm so annoyed with the world, I swear to all employers! If you can't afford to pay a full timer or part timer, don't bother to hire at all!