Bloodborne is absolutely infamous for its difficulty. Based on works by Lovecraft and Stoker, and real life places such as Romania and Czechia, it’s a pretty gothic atmospheric game that focuses mostly on combat. Well, you’ll be mostly focused on the combat, because that’s the difficult part.
The bosses are painfully difficult and will take multiple attempts before you can beat them, learning the patterns and developing some sort of muscle memory between your hand and the controller. It’s not impossible to beat, but it’ll certainly require lots of long breaks and trying to calm yourself down before continuing. Good luck.