Buy corn kernel for making popcorn

Interesting question. so I pulled out a hot air popper (you wouldn't want to use a oil popper to try this.) and put some popped dry corn into a food process and let-her-rip. I wouldn't call the results "masa" but it might be usable for an ingredient in a breading.

I call your attention to the book "POPCORN". It has a nice collection of recipes which include popcorn, and in no case does the author suggest reducing popcorn to corn meal, so I suspect the answer is, "Yes, ground popcorn meal would differ from ground corn."

You probably have already purchased an oven at this point, but this video from America's Test Kitchen seems to explain a lot of things and offers some purchasing suggestions.

The model they recommend is the Breville Smart Oven, however it is made for the US and I could not seem to find a version made for 230V outlets. A reviewer suggested using a "step down transformer," but I don't have any experience with using US appliances in other countries so use your own judgement here.

If you've already purchased an oven, please let us know what you got and how it turned out! I find the idea of using a small toaster oven for heavy duty baking fascinating and would love to hear if you were able to make it work.