I can't even picture how this works. But I write weird too--the last knuckle of my index finger is bent back in a way that other people think is bizarre.
My paper needs to be sideways because I write from down to up rather than left to right. Also, I rest my pen on my ring finger which people tell me is weird.
Picture (ignore ratty bandage pls). My arm is parallel to my desk, and my writing is perpendicular.
This isn't the normal way to hold a pen? You can add me to the list of right handed people who don't write properly. I tilt my paper on an angle, not as much as you do.