Actually Rey was not a orphan. But leaving Rey in Jakky, her parents went to other planet. So Rey believes that her parents will comeback and find her any time tomorrow. In Jakku, she found iron and exchanged them to her meal.
Finn was a stomtrooper who is a soldier for Darth Vader. But when he encountered his first battle, he felt it was not a right way. So he decided to escape with Poe.
First Order made a weapon absorbs sunlight and then change to weapon. This weapon can destroy whole planet. A planet that attacked to this weapon disappear completely.
So First Order let this weapon take aim to Resistance.
BB-8 has a USB preserved a map that can find Luke skywalker's location.
I watched this film in theater. So this time was second time. But it was not boring! I really enjoyed this. Kylo Ren is absolutely bad guy. He tricked Han solo and killed him even though Han was his father. How bad he is! And there was a scene that Rey and Kylo were fighting. I don't know why but I felt something wanting watching this scene.