I am fairly new to blender, so please don't assume I have tried to do something that seems obvious to you.
I am trying to make an airplane in blender, I am following a tutorial (its a two part tutorial, this us the part I was on), when I go into edit mode, it allows me to edit almost any part of the object (there is one object and 3 empties, which are pictures), but it does not allow me to edit one specific part of the object. it allows me to select that part of the object using the face select and edge select, but for some reason not the vertex select, it also does not allow me move or resize that part of the object (I tried both with the shortcuts and with the side-bar), but it does let me delete.
There is a reflection (I forgot the exact terminology), so whatever is edited on this side of the plane will be replicated onto the other side.
It is very probable that I pressed the wrong short-cut at the wrong time, I have done that many times, but I couldn't find a correction for this anywhere, so here I am.
Thank you in advance :D