First lay out the basic skeleton, this will be your referance point for the whole picture
1] draw a basic circle for the head, this will be your measuring stick
2]the upper torso, and lower torso are about the same size as 2 heads
3]the shoulders, should end just beyond the upper torso, on the upper corners, the closer the cuter, and easier to work with armor
4]the elbows are about the same height as the intersection between the upper and lower torso, or the bellybutton rather
5]the crotch should at least be the same diameter as the head, women have bigger hips, because large booteys are sexy
6] the knee should be about 2 heads away from the pelvis, and after the knee, the legs actually go backwards a bit, if they are idle, or standing somewhere without motion
7]the feet should be uhh, big enough to stand him up, dont be afraid to make them a little larger then human feet

remember these things arent human, but they need to have the same basic motions as us.
also, dont frustrate yet, the hard parts are yet to come

now give him some meat
stick with basic shapes, and try to just give you something to mold on, these lines arent really permanent, unless you want them to be
1] for the nose just take a block, and put it from the middle of the head, to slightly below the bottom, then curve the jawline to meet it
2] for ears, they should be where your ears are, but the bottom extends down to the bottom of your jaw, and it goes downward, and slightly behind you

here are some key points for armor a few things to keep in mind, is assimetrical armor, is a good sign of a sturdy design, no matter how much of it doesnt make sense
1] i usually start with the shoulders, seeing as how they are the trickiest thing to master.
2] try to avoid making the chest piece into one solid piece covering everything from the neck to the groin, not only does it usually end up looking lame, but its pretty hard to be flexable in
3] elbows can be tricky, and it isnt really a big hazard zone, so dont feel crappy if you cant draw elbow pads
4] the knee is actually 3 seperate pieces, which brings me to another point, dont be afraid to break one piece of armor into several layers, it ensures flexability
5] feet should really only be armored on the toes, the heels, and the soles.

ok, here are some basic armor designs, note that you dont have to deck out the kiwy in every part of armor, but as a referance, i did all the crucial spots on here.
one thing when making a big suit of armor, is keep a theme in mind, dont give him a simple chest piece, and arm guards with plain shoulder guards, and really fancy and obnoxiously shiny greaves (shin armor)
1] smooth armor edges that are directed inwards, you dont need your kiwy stabbing himself with his armor
2] make sure it's well balanced, dont give him gigantimus shoulder pads and tiny other stuff
3] dont over complicate the armor designs, it can be way more work then you bargain for
4] gravity exists, make sure that any loose armor looks loose and draped
5] the tip of the nose goes on the corner of that old block we stuck on his face earlier :D