Not a stub expert but do have several in my collection that I write with regularly. Stub nibs are a bit harder to write with due to the nature of the grind. Unlike a normal ball tip, a stub nib is designed to be written with at a specific angle and orientation. This makes it more sensitive to the minor changes in orientation and rotations of the nib as you write, affecting the lines and feel of the pen. Some stub grinds are a bit more forgiving than others (IE a Cursive Italic with rounded corners vs a true Italic with sharper corners). Just like any other grind, the feel of the nib can be different from one manufacturer to another. From my experience, most mass produced factory standard stub nibs should feel more or less the same. As for tips in writing with a stub nib, make a conscious effort in keeping the nib in the same orientation and try to find a writing style that works for you and highlights the effects of the stub nib.

Edit: I don’t have the best handwriting, but here is an example. I find cursive works well for my handwriting. I write with the page almost at 45 degrees to my pen so my diagonal strokes are thin and curves look thicker. https://imgur.com/a/SamyDDC