Hi Andrew!
First thing I noticed is that you have great line confidence :) you've outlined your shapes quite well here.
I'd recommend adding more detail to the shapes that you've hatch-shaded and stick to the confident line work that you're showing in most of your studies here. Some of the hatching does warp the overall form of the shapes (namely what I think is an apple (?)) in the third image which makes them feel less solid. Also, try adding a cast shadow after you've hatched some of these objects (if you have time, ideally in longer durations) so that there's a sense of dimension to their existence in the space/surface they sit on.
Similar critique for the first image - your inclusion of the decorative elements of the pitcher (?) give it personality which is great! Make sure to stick within the bounds of the shape itself so that any overlapping lines don't detract from the overall shape of the object. As for the firework (?) adding more detail is key! They're fairly primitive shapes, so it may be difficult to capture all of the details without making it feel busy.
I hope this all made sense! Overall as I first noticed, your line confidence is great! Your strokes are clean and objects are mostly identifiable (which is ideal) keep going and great job!!
Thank you for the crit!
It makes sense, most of the studies I do are shorter so details are few and far between, but I will keep in mind about the drop shadows.
I appreciate your time!!!!