small shard
You need to work on anatomy. Proportions, shapes everything needs to be worked on. You also need to work on drawing structure rather than straight up lines
#what should i improve?
solid niche
Rendering means nothing if u dont know ur funamentals well (which includes form and lighting)
Drawabox.com has a rlly good FREE course on the fundamentals. Tutorials by sinix, marc brunet and proko will help u in the anatomy portion (goes in hand with fundamentals)