I think anyone can write with a pen, but it is a big problem whether they can teach it well.
There are many calligraphy classes now, but most teachers are not good.
Even some teachers can destroy good students according to his ideas, so choose teachers carefully.
Don't be fooled by their appearance. People who know a little calligraphy can speak a little. Don't think they are great just because they can speak a little. It will be of great help to you if you can find a good teacher.
I also study calligraphy and my teacher is very good, so I will give you some advice here, but it depends on whether you accept it or not.
To add what I said upstairs, copybooks are not practiced blindly. There are a lot of copybooks now, and the copybooks used in general schools are useless at all. And some copybooks on the market are fake and rare. Choosing a good copy template is only the most important, because it may affect your future writing.
Hope to adopt, thank you for your cooperation.