Hola there ! Saw your parrot on the recent uploads and I have to say it looks quite nice ! Same goes for the eagle. And the "Lake - I'll edit this later" has a look to it.
As for the criticism, I have none, but I'd suggest asking for all kinds personally, since we learn from our mistakes,, and improve via failures (Nietzsche said "What doesn't kill us makes us stronger")
Have a nice day and welcome to DA ! Sure you'll do well !
RP