Be advised that while this game has been updated for modern audiences (over-the-shoulder camera, comparatively plentiful ammo, etc.) it is still survival horror. You're going to spend a lot of time avoiding combat when its possible to do so, carefully lining up headshots when its not, and managing your resources. If you approach this game like a COD zombies mode, you'll run into a brick wall when you get to spots that require you to have some ammo stockpiled.
The thing that makes these kinds of games fun is that while they look like shooters on the surface, they're essentially puzzle games. You're constantly asked to figure out how to accomplish short-run goals at the lowest resource cost and at an acceptable level of risk. For example, to get out of this building and advance the game, I need to get a key item out of a particular room. There is a big, invincible guy following me around who is going to barge in as soon as I grab the key, and there is a powerful monster right outside the door that is blind but responds very aggressively to noise. How do I get in and out of that room without getting myself killed? "Guns blazing" is an option, but the game never gives you enough ammo to rely on that as anything other than a last resort.