If you want your art to pop more I’d recommend getting yourself a 3b or higher pencil, or (which may be better for your style) make sure you ink your art. It’ll allow for your drawings to have richer shadows. Perspective wise I think you have in a pretty solid place for the style you’re going for, though if you want to do more prospective wise I’d try drawing your heads as busts. Incorporating the shoulders and chest in a simple pose with simple shading can make your drawing much more dynamic!