Sword six represents a new life, and inverted sword six means that you can't start a new life, and the journey is not smooth, because sword six itself represents potential danger, and a ship with six swords is dangerous. Inversion means that hidden dangers will break out and make it impossible for you to start a new life.
Holy Grail V stands for disappointment and blindness. Now your idea of this school is probably a little extreme. Either you definitely want to choose this school or you don't want to go to this school. No matter what your state of mind is, I suggest you think in the opposite direction. If you want to go, don't go. If you don't really want to go, you can think about it, because the Holy Grail V only represents the bad in front of you, not the good behind you.
The priestess needs no explanation, representing authority and wisdom. Compared with the uncertainty of the first two schools, it is much better at first glance.
I suggest you give up the first school directly and reconsider the second and third schools.