The truth is that when you work in the food industry, you get TIRED of eating their food. It gets BORING 0 and of course, when you come home, you smell like the food that's cooked. How can people NOT start bringing their own lunches after a while?
Plus, working in food service is busy
The days go by fast, tons of walking and moving
If it's a common chain restaurant, they should have calorie information available. Maybe in a pinch you can make your own unique meal that's a healthier choice.
I think that you can totally do it. The financial security of the new job with also help you, too