On just where to find the new content or in general? The game should be straightforward enough you can find all the content by just walking around and talking to people, save for very few secret scenes.
If it's just the new stuff, Abby is at home as always, Jun is near the park and Ember is working at the convenience store. You can also check the signs in front of their houses and the game will give you a hint at where to find them next
Nope. It's a repeatable scene tho, so you can trigger it every night. But I'll stop being annoying and just add the rest of the scenes to the recollection room next update.