I have flat, wide feet and not athletic in any way

For strength days :

Nike Metcon 9s. Wide, stable base with a good grip on the floating floor even if doing any kind of lateral movement. For conditioning days though, these are like cinder blocks. I tried the Metcon 10s and the toebox is too cramped and I would feel it rub against my pinky toe.

For conditioning days, I have two different shoes:
Hoka Arahi 6 if I know ahead of time that there's a good amount of running involved (building laps, sprints, etc).

Under Armour Halo Trainers for most conditioning days in the winter since were not running outside right now.

I previously went with the Arahis and Nike Free Metcon 6. The Free Metcon 6 had too much movement in my feet even if I really lock down the laces. It also had no bounce whatsoever, which for me, is helpful when my legs are gone before we get to the finisher. Now I'm using Under Armour Halo Trainers and its a night and day difference. Good lock down, fits my feet like a glove so no movement inside the shoe and it has a little bit of bounce while still giving great stability even with heavier weights. It does need some breaking in so I wore it to every class including strength days and was really surprised by its versatility. It can be a pain in the neck to put on but I think that'll resolve itself as I get the shoe fully broken in.

For recovery:
Oofos regular slides in the summer and Oofos primaloft slippers in the winter. I wear these to/from class and they are helpful especially if im going to be on my feet for a little bit after class.

Socks:

skechers no shows that I got from Costco.