It's cool that you got into inking. I, for myself, haven't done as much inking in the past but I think it's a unique way of expressing what you want to convey through your art. I can definitely see that your artstyle is inspired by comics and I think you're on a good way with developing your own.
Haven't heard of neither Shawn Cross nor Heartgrinder yet but I really like their style.
With picarto.tv, I think they have a help section on the setup. Check it out if you're interested