How to practice left-handed hard pen calligraphy?

I write with my right hand, but I can't write well, so one day it suddenly occurred to me what it would be like to write with my left hand. Because I have never written with my left hand before, writing with my left hand is the same as just learning to write. So I found a block letter copybook in Pang Zhonghua and began to practice horizontally. It has been very good in less than half a year. Now my left hand handwriting is better than my right hand handwriting, but I only write in block letters, but my running script is not good enough. I need to practice more. So there is no need to find relevant tutorials. Where there is a will, there is a way. As long as there is a heart, it will have an effect. Try it, don't look for any textbooks, just find a copybook you like. From now on, stick to it for half an hour or an hour every day, and you will soon see the results. Really!