Welp, this'll be my first Ninja Gaiden. Any tips on how to play it?
With the understanding that it's completely unlike Devil May Cry or God of War. The controls will feel clunky, the enemies will hit you and you will think it's unfair. If you practice you may get better, but it takes an actual commitment. You may want to seriously consider playing on one of the easier difficulty settings until you become acclimated to the enemy types, even if you normally avoid easy modes.