Hi cool stuff I like the separated limbs and big mech body friend.
I found some similar-ish things and thought they might help you out if you are looking for details or things to add.
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Looking forward to the 3D, if your new look up some tutorials online youtube has some good ones artstation, polycount.
A whole bunch all over, gumroad is usually paid to learn afaik, i hear they have some free stuff, I haven't even looked at gumroad tbh ever but i see links everywhere. Probably good for anyone to check out.
Nice work, hair is difficult(for me anyway) in 3D if you are going for realism.
Best of luck, looking forward to update.
Added img of imgs if people don't click links or if you don't, click links.