If you keep rotating the paper so that your nib is parallel to the slant lines on your exemplar, you will find the *direction* that you need for allowing the nib to perform properly.
I have had students who end up with the paper pretty close to upside-down - which seems like it's too radical a change to work -
but, when you start with the basic strokes and you start seeing the proper thicks and thins, you realize that you are putting shapes together.
Keep the exemplar in the same orientation - and eventually - it all comes together.
I've seen left handed people who write on paper that is turned 45-degrees and further - just for their regular penmanship.
Keep looking at the individual strokes and how they fit together to make letters -- and words.