No worries! :) Feel free to check out the discord to see if there's answers to any future questions you might have.
1. The start is in the bathroom of the HIVE building when you try to exit into the lobby. You'll have to play around with the heroines bimbo/non-bimbo states.
2. Similar to the first answer.
3. The books in the right room of the ICPD Station will open up and allow you to view the "bad end" of each area. If it doesn't unlock after you beat the boss (I'm pretty sure it does), it will unlock once you beat the game.