i dunno bro…i mean naturally they look good, but it’s a tracing. what might help you is to learn the basics…i know it sounds silly, but break down geometric shapes. learn what it means to see “through” an object.
draw a tennis ball, till you totally understand shading…how it exists in space…then draw a tube, like a paper towel tube or something. get the perspective thing down. then glue a papertowel tube to a tennis ball, then draw it from all angles.
then draw a kleenex box…then stick the tennis bal (still glued to the tube)l 3/4 into the kleenex box…draw the hell out of it…understand it…then realize something like that makes a GREAT robot shoulder/hip joint…once you can draw that…dress it up. draws wires, armor…etc.
the guy that did some design work for ratchet and clank grew up near me. his mom comes into my video game store. apparently their family owns a hardware store, and he used to draw all the screws, bolts, pipes… now look at the cool ass weapon designs in that game…you can see his direct influence.
basically, don’t be afraid to get messy. don’t be afraid to draw something that doesn’t look awesome. but you will learn more drawing and understanding the “lesson” i just gave then you EVER will tracing.
jusy my 2 cents.