Hey @jasper108
We all start as noob’s, and we ask the noobie questions.
1. You have overlays turned off (top right of the 3d viewport)
With it turned off the verts are not visible, although you can still select them.
2. It looks like you may have flipped normals.
In edit mode select everything, then in the 3d viewport at the top select Mesh > Normals > Recalculate Outside (or with everything selected the shortcut SHIFT+N)
3. Probably same as 2.
Hope this helps!
Happy Blending
