Suggestion 1: first buy some copybooks to trace and make a plan. No matter how busy you are, you should squeeze in some time to practice your handwriting. This time must be fixed, only a little more. You can set it for 20 minutes first and add it later. Make sure that the written words are effective and not fast. No matter how many pages you write in succession, it's useless. It is better to write a page with your heart, not quantity but quality.
Your writing style will change as your hands become smooth. After you describe it for a period of time, you can copy it on some exercise papers and try to write your own words like a copybook. And when writing at ordinary times, don't get used to writing in the original style, but remind yourself of the places that need attention and apply what you have learned.
Suggestion 2, collect some tips for writing good words. Write the radical first, and search the norms of how to write the radical on the Internet. Chinese characters need to be horizontal and vertical, and all strokes and drawings are sloppy and exquisite. Write that picture first, then write that picture. Write that picture longer, that picture shorter, those strokes heavier and those strokes lighter. For words with left and right structures, the left part is larger than the right part, and the right part is smaller than the left part. The same is true of words with upper and lower structures. It depends on whether the upper part is small or the lower part is small. Only by mastering these rules can the written words look good. These all need your careful observation and memory.
Suggestion 3: You can find some experts who are good at writing and ask them for advice. Ask them to help you point out where your handwriting needs to be improved. Is it too small? Still too big? Or is it too grassy and irregular? Or are you holding the pen in the wrong position? And how to write and so on. These masters can write, so well, they must have their own way, as long as you can learn a thing or two, know a lot, work hard, practice hard, believe you, and write better and better.
Recommendation 4: Practice calligraphy in your spare time. No matter whether you are at work or after work, you can take out your notebook and practice your calligraphy at will as long as you have free time. If it is really inconvenient, you can imagine having a pen and paper and practicing with your hands.
Nothing is difficult in the world, but you can succeed in everything if you put your mind to it, let alone write beautiful words!