To practice pen writing, you also need to have the basis of writing brush. Because the standard of pen writing and brush writing is the same. Words that do not meet the standard of brush calligraphy in terms of strokes, structure and layout. It must not be good pen calligraphy.
Because there are many restrictions on practicing calligraphy, it is impossible to practice calligraphy anytime and anywhere, so you can also practice calligraphy with a pen at ordinary times. Of course, as a hard pen, the writing style of a pen is not exactly the same as that of a brush, but it is still possible to master the basic form and structure of words.
Practice writing 20-30 words every day, but remember the words, writing methods and forms you have practiced. Calligraphy practice is not much, and some people have written all their lives without making any progress. Therefore, the key is to apply what you have learned to your daily writing. Once you form a habit, you will practice writing.