I’m interested in starting in ambiance mode to get the ropes down, and then switching to story. Would I be able to use this technique as well? Sorry for replying to this so late! I’ve just been curious :)
Viewing post in Story Mode to Ambiance Mode
You would probably want to start a new save in Story mode after the fact, cause it has day dependent content you could miss if you switched later on.
Alternatively, resetting events and objects keeps your points and upgrades, which could allow you to switch and keep some stuff. The mailbox outside the front door stores objects between saves and resets, if you have anything physical you want to keep.