I guess that would depend on what you mean by difficult to play. Inventory management was somewhat confusing to me at first, but a short video on youtube solved that problem. Once I had the basic knowledge to get around, I watched a few streams from more experienced players and that was a big help. My suggestion is to try low populated servers at first so you can get used to the map, good locations for gear, how to handle zombies, and where to find the essentials to survive (food, water, medical supplies, etc) and you will be good to go. I never played arma2 before getting dayz, but adapted rather quickly to the game. YMMV