>>717894824
Timed content tend to be obvious, as it has been said if you approach a burning house or somebody who's been poisoned they will not survive a Long Rest. But you can safely count such occasions on one hand in Act1. The big trigger that somewhat advances the world state is entering the Rosymorn Monastery Trail for the first time. Don't worry, the game will warn you! Technically the Monastery is optional and still Act1 but you can go into Act2 from there (Shadow-Cursed Lands) which is the next big trigger afterwards. Now these can fail even high-level quests too, if nothing due to not having access to the said region (in the latter case) anymore. No need to worry though, just make sure to take care of whatever you come across before making the big jump.
As for the Long Resting: listen to others and spam that shit. I know I missed plenty of camp cutscenes and interactions by being resourceful. And for what? I'm on my first run and thus playing without mods but I have this one saved for my second run: https://www.nexusmods.com/baldursgate3/mods/1879 By default this dialogue icon means a character has something new to say to you. This mods also makes it trigger if you have a new Camp Event unlocked, in other words: when it's time to do another Long Rest if you don't want to miss out on content. Just keep exploring and food ceases to be an issue early on.