This modpack is primarily focused on creating an immersive atmosphere and featuring stalking entities. Most of the typical "I appear out of nowhere and chase you while screaming until I kill you" monsters are not included.
Warning: This modpack contains the mod known as Evil Hunter, which includes some gore imagery. Even though these images are fictional, I understand that some people may find them disturbing. If that's the case, feel free to enable Content Management and disable the mod. It shouldn't affect the overall experience too much.
One recommendation is to activate the altar mentioned in one of the books you get.
The modpack also includes a shader that greatly enhances the experience, but don't worry if your PC can't run it—it won't ruin the experience too much.
There are also guns available to give you that false sense of security.
You can even build security cameras for a classic "FNAF" feeling.
Finally, you can play with friends using the Essential Mod and Simple Voice Chat. However, keep in mind that some cinematics may not play for every player, and certain entities are designed to focus on a single player.
Good Luck!