start off with a circle then stick 6 legs off it and you've pretty much got all the insects covered... wings are an optional extra
No. A wasp is an insect and no insect has a bony skeleton. Its hard outer casing gives its body its shape.
metamorphosis
A hard outer covering protects an insect's soft body and gives the insect its shape.
household casebearer
A stick insect is camouflaged by colour and shape to look like a twig when stationary on the branches of a bush.
A caterpillar isn't and adult insect. A caterpillar is an intermediate shape on the way to the finished insect. So it doesn't really make sense to talk about a caterpillar lifelength. Unless stopped by something else, caterpillars eventually metamorphose - change into Another insect shape.
A Spider
bedbugs
an abdement bug
I don't mean to crush your hopes into tiny pieces, but you cannot gain any insect powers in any way shape or form by any means publicly available (or privately for that matter).
The larva's internal organs are re-structured and re-shaped into the adults body shape.
The leaf mimic katydid has a structure on its back that mimics the shape of a leaf. The niche of this insect is an herbivore.