try some finger food first - bread crusts, breadsticks, peas, corn etc. Let her play with these, but see you eating it too. Some might make it's way to her mouth
Also try making what you are eating, and blending it a little, and then let her eat that. I'm an awful cook also, but as long as you cook the food properly it will be fine. Also by blending it a little, it isn't always as smooth as a jar.