I want to become more brave

[Nospheratu]

I still want the genuine experience of playing in pitch dark with headphones and high volume

Well, then there's not much to do but to mentally prepare yourself for a scare-a-thon, constantly remembering that it's only a game and taking breaks when it get's too scary for you too handle. Flcn's tips are also very useful.
I could help you a bit with a hint, but it's kind off a spoiler so I won't unless you'd really need it