Blog:How to upload images in mirahezepaint

New guy here. I've created a few articles based on shows I know of that are pretty well-received, but the one thing that's annoying me is that I don't know how to upload images of the shows' title cards so that I can make the infoboxes look nicer. I tried Special:Upload but I don't have permission to use it, and verifying email didn't give me any autoconfirmation. I'd like to know how to upload images so I can fix those and any other blank infoboxes I come across.