Nice job on the studies! And nice choice of artwork for reference
Dante and Virgil by Bouguereau is a fave of mine before he unfortunately submitted to those days’ version if instagram algorithms and avoided the more badass paintings for the rest of his career
As for procreate, I find it is a super powerful tool, I am ising it a lot as I travel and work a lot so I can just find some time and hit it, a lot of my recent pieces are done on it because of those circumstances. I find that using one or two brushes almost exclusively helps as you really learn the intricacies of a single brush, but it takes some experimenting to choose em. From the vanilla brushes I really like the simple
flat brush and the 6B pencil
Also, it has perspective grids where you can freely add your vanishing points to help you out
Cheers, keep it up!