Having read this I think I realized why I'm having trouble and so many other people aren't; I'm trying to play this game like it's normal D&D. I'm not picking up and throwing barrels, using jump a lot, stuff like that, whereas I feel like other people are using the game mechanics as given and are getting their heads around it faster.
Neither am I. I long-rested twice (mostly recently just before reaching level three). I don't throw things or use/target barrels. Am I getting lucky rolls? Others getting unlucky rolls?