Yes, a person who spent their life fending for themselves and scrounging shipwrecks would have no idea how to handle themselves in a flight or fix a ship or know how to fly that's so unbelievable.
Also, yes, Force Ex Machina. It always has been a completely silly plot justification but the point for *****ing about it passed in the Seventies, bud.
Did you not watch the video? It touches that, but also you're ignoring that there is literally 0 character development when it comes to the force, especially compared to the other characters in the series. Look at the definition and you'll see she is a cookie cutter image of a Mary Sue. Again if you guys weren't questioning how good she was how fast with very little actual experience you guys really aren't analyzing this very much.
Also I want to point out I would have a problem with this if it was a Gary Stu, it's just a poorly written character. I'm guessing due to feedback it will be fixed in the next movie.