I picked this up on PC on release and it was my first Souls game. The difficulty was vastly overrated, especially if you play other games on the highest difficulty. Paying attention and patience are all it takes to finish Dark Souls.
I was going to mention this as well.
Dark Souls is difficult, but there are ways of changing the difficulty to be more in your favor.
If you are having trouble.
Upgrade your weapon and armor
Level up a bit, HP and Stamina will allow you to take more hits.
Summon people or NPCs for fights.
Check out some boss guides, its recommended you go in blind, but if you are getting frustrated check out a video online.
Once the game mechanics click, it becomes a truly amazing experience, worth it at any price point.