Provide a savegame please, I cannot play the tutorial its bugged and there is no mission / singleplayer for me to choose. I guess I have to play the tutorial first?
You need to play only a few minutes of the tutorial and then you can skip it.
After you spawn in, you just head straight through a door and up to the statue and make a right into a door. Follow that a tiny bit until you see a big blue portal and a sign that says skip. Next you break open a tablet to learn the fireball spell which will open the next door automatically. Break open the portal tablet in the next room and then use the portal spell to go to town. That is the fast skip version of the tutorial.
I'm not home to provide a save right now, but that should be how it works.