Just start lying.

Obviously this is the solution, but you only want to half-lie, because full lying is shitty and if the relationship works out a lie about your job is not something you can really keep up, anyway. What do I mean by half-lie? Pick something else you're doing or want to do (that you actually like) and say that's your job, but you're just getting started and haven't gotten it totally off the ground yet. Worst-case scenario, pick some line of work you'd actually like and say you're working towards starting your own business as that. If pressed for details, present your exploitative wage job as a temporary means of paying the bills while you gravitate towards what you'd actually like to do (again, this is only a half-lie). For example:

• "I'm trying to make it as a musician, but until I hit it big I'm doing X to pay the bills."
• "I'm studying to be Y, and doing X to pay the bills."
• "I want to open up my own bar/restaurant/store/whatever, and I'm putting together my business plan and saving money doing X right now."

You may know this is a stretch, and she'll probably know it too, but if she otherwise likes you it can help get past any superficial financial hesitation she might have (and in a capitalist hellworld where all human relationships have the potential to become crippling financial liabilities, you unsurprisingly find a lot of that). You're not trying to trick her into thinking you're loaded, but if her friends/family look down on people with real jobs, and she doesn't (yet) like you enough to navigate through all that, you're being reasonably honest while giving her something to take home to that crowd.