Hi Sanguinlover. Good for you for starting a lens. I'm just now starting to get the hang of these things and can give you a few tips. Although, there are people out there that are much better at these things than I am.
Break your lens up into different modules. For instance do a module on Fractured Life and feature some of your products, a module on House of Prytania and feature some of your products ,etc. From what I understand, the more modules the better. Or you could even do modules by product type such as t-shirts with examples of your work, mousepads with examples, cards, etc.
The next thing is to actually link your images to your Zazzle shop that way when someone clicks on them they go directly to that product's page allowing someone to purchase it immediately if they so desire.
Another thing you could do is use the Amazon module and find books on Witchcraft, Vampires, etc. and showcase some of those items as well.
You've got a good start. It definitely takes some working to get use to putting lenses together. It has for me at least!
I hope this information helps some! You are wonderful for donating 15% to the Humane Society!
The Spotted Olive