Do I have to use a pen to practice running script? Can I use a pen?

From the perspective of calligraphy, the effect of pen is better, and it is better from the friction of paper and the feeling of writing. Pens and signature pens are so slippery, you can use force if necessary, such as folding these strokes horizontally! So you can see the pen! Moreover, pens can write skillfully, and muscles can produce memories. When you write a word in the future, you can naturally take out your pen.