It's not that you have to practice any style or you can't practice many styles. Every time you learn a font, it's not just to look like it, but to know what features, advantages and disadvantages of that font and how to use a pen. Practice one font to a satisfactory level, and then learn other fonts in a targeted manner. After a long time, you can learn more about different fonts and gradually discover your own advantages and disadvantages. Beginners practice a style first, and then learn from others when they are proficient.
If you want to practice your handwriting well, I suggest using calligraphy tools such as Sambo, which makes rapid progress.