It is also my first time making one of these, and I'm personally gonna go to the side of making the player feel anxious due to the ambient and player expectation. As in my experience these have been the most upsetting for me maybe for you those are the jumpscares or the chilly story ones, making something that would scare you its the best but consider that if you only playtest it yourself you probs wont get scared knowing all that happens behind the scenes