Does anyone understand?

So all of you out there who watch Lost, please help me. This show seriously has my wheels turning. I know Yale has started a new Harry Potter class. I think they should create a Lost class. There are so many unanswered questions, so many what ifs?
Apparently, there are 7 seasons... okay so what more can we find? I'm totally confused about Jin's death, the underwater plane, how the rest of the people on the Island die bc only 6 live..
This show is good.. any insights?