In my experience, most laser printer papers feather heavily with fountain pen ink. I buy the Target brand ones, and they handle FP ink decently well.
But yes - you definitely need paper that handles the ink well. Most notebooks sold in regular American stores do not. If your city has a Kinokuniya[1] store, likely most stationery sold there will handle it well as fountain pens are still used a lot in Japan.
I ended up getting a Japanese notebook for that reason. I think the one I got may still have been a step up in quality from what's standard there, but it was a leap up from the generic US notebook I had been trying to use.
But yes - you definitely need paper that handles the ink well. Most notebooks sold in regular American stores do not. If your city has a Kinokuniya[1] store, likely most stationery sold there will handle it well as fountain pens are still used a lot in Japan.
[1] https://usa.kinokuniya.com/