I'm sure deep down she's happy that you have a job doing something you enjoy. You do seem to enjoy cooking a lot and I don't even know you that well. Just give her time.

You'll do fine at this job. I believe in you and I'm sure she does too. Just try to stay positive and look towards the good points of this job. If you are energetic about it, that energy will eventually transfer to her as well and you can share it.