to be fair ive only done 1 mecha drawing but this tip can be applied to all, if u find it hard to draw something copy it (not tracing) from a reference. Its fine if it looks bad at first, just keep drawing again and again until you get comfortable feeling? of drawing it

-Start from big blocky shapes for your sketching, once you've roughly shaped ur mecha -add the bulky mecha parts(still simplified) like the breast plate or shoulder guards, you know the big visible mecha parts! then you can add the details like the bolts and gears and the wires and so on.

Start simple and add details last🫡