Yes you can house them individually. The bins you linked are smaller than anything I've ever used long term, I do put small quantities of isopods in small deli cups for sale but those deli cups are meant to be very temporary and they don't allow for much of a moisture gradient which could easily lead to complications/die off.

Wally (supreme gecko on youtube) suggested these bins and while I haven't used that exact bin I have used very similar bins for starting off smaller cultures. For single isopods I would probably aim for something in the 6-10 cup or so size, I prefer rectangular shapes as it's easier to see and control the moisture gradient. If possible and 3-4 inches deep and 6-8 inches on the "long" side so that when you water you can see how far the water seeps across the bin.

You mentioned misting and I want to clarify that typically we suggest keepers spray the wall of the moist side of the bin, let the water run into their moss and substrate as misting from overhead really only wets the topmost layer and you'll run into issues where you're misting every day which is not optimal.

I would go with 3-5 cm of substrate which would consist of a mix that includes organic topsoil, sphagnum moss, leaves, calcium source (crushed eggshell, crushed oyster shell, aglime, cuttlebone, etc are all valid options) and natural hardwood lump coal (small pieces no larger than ~1 cm cubes).

This album is from some bins I recently set up, put in one piece of bark or some eggcrate over the leaves that extends as much as possible from the "dry" side to the "moist" side if you wish but since there is only one isopod this may go unused.

This entire subreddit is basically devoted to ~30,000 people that do keep isopods as pets so you've come to the right place.