In reality, that pixel size is only about 2 inches wide. Don't forget that Clip Studio Paint also comes with some pre-made page sizes that are very handy as well, including B4, A4, B6, etc. (and the actual line templates if you need them).
So I would suggest making a bigger canvas size, but remember that the dpi is just the dots-per-inch output and only affects the resolution when you adjust the size/zoom in/out/etc. and won't account much for print size if the size of the page itself is only 2 inches wide (and there's only so much you can increase a page size before it loses its quality.)
For reference, I typically work at 350 dpi, with my canvas sizes starting at 8.5 x 11 (the standard size of printer paper).
So I would suggest increasing your canvas size, while maintaining your dpi between 350 - 600. That way you work bigger, so if you need to shrink down, quality won't be lost as much - it's a lot easier to shrink things down than make them bigger.
That's just my two cents though, I'm sure I'm not 100% right about all that lol