Hi there,
There is an option for field of view in the Settings/Gameplay menu.
I would suggest you try the bottom (80) value.

If on that setting you still feel uncomfortable, it would be an idea to play on a smaller, windowed version. Nausea will most commonly be caused by the quick peripheral movements, so having peripheries of the game area more centered in your vision field (i.e. having a smaller window) may help.

I hope it helps.

PS.
The slider only goes from 80 to 100, as FOV outside this scope was breaking other things...