A super wide needs to be used carefully, or the wide angle distortion will be bothersome to look at.
I don't know what the 35mm camera equivalent lens would be.
I used a 24mm lens on a 35mm camera, and I always had to be careful not to tilt the camera. And I would not use this lens unless I had to. It was too wide for normal use.
Is it possible to rent that lens rather than buying it? Then you can see if you really want to buy it.