Welcome! When shaving against the grain, this is a small list of what I would invest in:
Shave Secret
Shaving brush to mix Shave Secret
Bump Patrol.
A Headblade with Headslick
When you apply your lather/gel/shaving cream with a brush, it loosens the hair to give you a cleaner shave. As far as razors, I use HeadBlade or a double-edge safety razor. With the Headblade, I would get a bottle of HeadSlick and mix it with shave secret. Most Headblades are designed to shave against the grain. Good luck!