Making the flourishes and thick ends and tapering ends to strokes is not possible using a normal ballpoint pen, other than frightfully crudely. And for some reason I have never got on well with fountain pens. A brush is capable of producing fine artistry but is impractical to carry around. What kinds of pen or pencil are recommended for producing handwritten Chinese characters?
try the “science brush pen” (科學毛筆), something like this:
muji has similar product 😸
for hard nib writing instruments, the fountain pens with the special nib “長刀研”, something like this:
well, it’s expensive (maybe usd 1000 upward)
have fun :)