>>7604605 (OP)Step 1: draw a humanoid silhouette, this will be the base of your mecha.
Step 2: look at references of cars, tanks, planes, construction vehicles, industrial machinery etc.; sprinkle into it things that you wouldn't normally associate with mechs too to give your design an extra oonph, for example look at certain animals like crabs, or slugs, or look at the design of a 2000s radio, or a hair dryer, a bathroom radiator, anything.
Step 3: draw the mecha while looking at the refs you gathered for that particular mecha design
Remember: UYFI
What does UYFI stand for you may ask?
Use
Your
Fucking
Imagination
The possibilites are endless, good luck anon-kun