Here is a useful resource to help you get your head around depth of field and how it changes depending on aperture, focal length, focal distance and sensor format. You can see the effect of changing any of these parameters on the field of view and the depth of field. You can explore this simulator at https://www.samyanglens.com/en/product/simulator/lens.php.
In case you haven’t come across Samyang before, they are a well established and well respected optics maker, and produce a wide range of photographic lenses in various camera mounts.