Spoiler for Hidden:
I liked Rey but come on. She knows the MF, is a dang rocket scientist, and a skilled pilot? A skilled fighter (which was the most believable). Then out of no where can not only defend from mind tricks but use it against someone as skilled as Ren (Stopped a dang blaster Neo style.) Then defeats him with a weapon shes never handled before?
Spoiler for Hidden:
Knowing the MF kinda goes with being a rocket scientist.
I feel like those three things kinda go with the territory. Was likely picking up lots of scraps and was quite familiar with how things worked.
Seems very likely that she was defending herself on a regular basis.
Special? Sure. Crazy impossible unrealistically special? Not as much as you're letting on.
Spoiler for Hidden:
I can't really agree about the last part. I didn't really feel like it was out of nowhere.
Here's why, there's so many indications throughout the movie that she is linked to Luke in some way.
Just the fact that his light saber was pretty much calling her.
Legend even suggested that she was already trained by Luke to some extent, and had her memory wiped.