New fish keeper over here

[Naughts]

The panda cory is fine in your tank, you could get him a few friends to reduce his stress.

Corydoras panda (Panda Cory) — Seriously Fish

www.seriouslyfish.com

The honey gourami (1 or 3, how many are left?) is also fine. Your only issue is the pleco, try to rehome it.