Well, some libraries might have digital collections of manga that include JJK. You could also check out official manga apps or platforms that have the licensing rights.
Online platforms like Amazon or specialized manga websites are good places to look. Sometimes, they offer various editions and discounts too. Also, check if your local library has it available for borrowing.
Well, reading the manga gives you immediate access to the entire story and you can form your own visuals. The anime, on the other hand, might offer a more immersive experience with colors, voices, and music. So, it's up to what you value more at the moment.