There's a lot more enemy tracking on hits, there's a lot more ledges to fall off of, the iframe mechanic is a lot stricter, there's a LOT more weapons to choose from, and armor, and play styles vary a lot more. If you've played Bloodborne, get life gems and treat them like blood vials. Don't rely on estus, or get stressed at how limited it is in the beginning. And yeah, adaptability will eventually help you be less slow awkward and clunky. Also DS2 has a lot more "gotcha" moments, where the only way to survive is to know it's coming. DS1 only had a handful of those by comparison. DS2 however loves hiding enemies behind things, or above you, or snipe you from a distance. They love poison, and curse, and will smash through everything you have with dark damage before you know what's going on.