That fear is something I run across a lot during readings. Often the advice given to my sitters from their guides is:
1. Make a plan, set a goal, where do you want to get?
2. Get a job to pay your bills while you're working on your goal.
3. Knowing you will not be wage slaving your entire life will help you work that day job while you're working on your dream.
No one says you have to get to that dream overnight. There are steps along the way. And no one says you need to starve while you're making your dream come true.
In other words, you're in transition. You know you don't want to be a waitress or a secretary or whatever your whole life, but that doesn't mean you can't do something like that now to make ends meet. It's part of growing up and becoming independent.
Don't be afraid.
Doing something now that you don't want to do in the future doesn't mean you're giving up or failing on your dream; it just means you're taking it one step at a time.