Where should I go after being transported to Demon Slayer?

Also known as: Demon Slayer: A Forced Kiss at the Start—After sunset, monsters called demons appear, feeding on humans. There exists a mysterious organization dedicated to killing demons, called the Demon Slayer Corps. This is the thousand-year-old feud between the Demon Slayer Corps and Muzan. (This novel is really just for my own reading; I don't need anyone else to read it, since I love Shinobu so much.) (Also, Susanoo is somewhat weakened here; please don't scold me, because I'm afraid it's too powerful, and none of them are a match for Tenichi.)...