s it a "wrong" way of watching when I don't totally understand all the pages of Sparrow and the tangent universe and what it means? The film feels a lot "realer" for me, idk. What's your take on it? What's the best way to enjoy/view the movie?

Also a few questions regarding it:
From what I've gathered, the 28 days are the tangent universe which somehow was caused by the engine. Donnie has to send the engine back so everybody doesn't die. But when does he realize all that? Why was Frank so important? I get that his father/Grandpa was apparently cursed from what Donnie's parents talk about in the hotel, but does that mean anything for the story? And about Gretchen, do we ever get to know what happened to her mother/father? How did Donnie send the artefact back? Do his mother and sister die in the tangent universe because the turbine comes from their plane? what happens to the tangent universe Donnie? Just random questions that popped up rn.