Printing from computer will give you almost next to nothing information about how it all would look on eInk. What you need to do is removing hintings and adding some little weight with Fontforge, saving as TrueType, and sideloading.
Then test them. If you can't remember how they look, take photos.
No other proper way, not really. You can't just download font files and put them to the Kindle, typefaces need to be prepared for the eInk.
Here is the one did:
https://www.mobileread.com/forums/sho...d.php?t=260978