This is a YMMV, I never got a smooth shave going with the grain, and going against the grain didn't seem to cause me any problems, so that's what I did. I was also never a particularly hirsute individual, and didn't need to shave more than once a week until I was in my 30s (and made it up to twice a week!)
Another few laser treatment sessions and maybe I'll be done with face shaving altogether! 😎