First off, the game always opens in a window in the middle of my desktop, using the fullscreen launch option made it fullscreen but still windowed, changing this in game will fix this, but it will not save the option, meaning you will have to do this each time you load the game.

Using the default Proton versions and Experimental kept on giving me Wine C++ Runtime errors, I found that Proton 9 got me into the game, the intro worked, even got to making my character but then the game freezes.