If you are new to this game and the company ''from software'' then you will struggle.
however its less difficult that their previous releases.
sekiro makes you deflect and parry in combat though it isn't always neccersary as stealth kills can be applied.
the game is quite big with many optionals paths, so if you are struggleing to progress, take a different route and get stronger then comeback later to it.
personally i love this game, however, after completeing the game, you release it's not very big.
No DLCs have been announced and they mentioned they don't plan to introduce any expansion to the game, which is a shame because of how amazing it truely is.
it was heavily inspired by games like 'tenchu' and 'shinobido way of the ninja''.
i encourage anyone/everyone to play shinobido considering you have the ability to pick up dead enemies and displace them so enemies are not alerted etc.