What is it like to eat only plant-based foods for a whole week? If you need some inspiration on what to cook, the internet is abrimm of recipes.
You may also consider visiting a website called ravediet.com as I found it to be a great source for further links to other sites.
Acknowledge yourself for lowering the market demand for animal-based food products for a week. It may seem like nothing much in the big scheme of things, but you are making a small impact on it anyway. And it will be interesting to find out what impact it has on your own body's wellbeing, whether or not you continue eating like that.
Who knows, you might even like it :-)