I agree with the Torontonian...

remove all the grass prior to setting up... ( the rotting grass smell travels far & the stink lasts quite a while... not to mention attracting every fly for kilometers ! )

BTW, you can put a solar panel to these pools & get amazing results to extend your swimming season.

I had a dolphino easy-set 18' x 48" for two years...

regarding leveling : when leveling for a pool, start at the lowest point on your yard & go from there
sand cannot be used to level these for safety reasons.

I think if I hadn't moved into a new house with an IG pool, I would have bought a Vogue Zodiak pool ( has metal framing)...
it has rectangular shapes instead of round, which is better for swimming & it is deeper.
It still counts as "portable" so you can get around some of the swimming pool by-laws, but you have the option to leave it up for the winter; which means a whole lot less work ( & less water consumption too)