My pen grip is wrong and my handwriting is ugly, but it's too late to change my pen grip now. How can I practice calligraphy quickly?

In principle, the posture of holding a pen has little to do with the aesthetic feeling of writing. The so-called correct pen-holding posture is only the experience summed up by predecessors. It is not necessarily suitable for everyone to practice calligraphy quickly and have a correct guidance for beginners. Hold the pen as comfortably as possible ... I suggest you go to the bookstore to buy a copybook and practice hard every day, but you must stick to it. I believe that with your continuous efforts, you have made great progress. Nothing is difficult in the world, and nothing is impossible to a willing mind ... Finally, I wish you success.