I’d recommend playing horror games if you want ideas for monsters and cyborgs. Its all good finding a picture of a design that you like, but there’s something so much more about sitting down in a dark room and fighting that monster - the sounds its making blasting into your ears from headphones. You get a sense of how it would move, and that really helps me.
I’d recommend playing Quake 4, DOOM 3, Dead Space 2 and Silent Hill Homecoming.
Two more games i’d recommend aren’t horror games at all, and are oldschool, fast paced FPS, but have some great designs. They are Serious Sam 3 and Painkiller: Hell & ■■■■■■■■■. Both of those games have COOP and are on Steam, so if you’re looking for somebody to play it with then feel free to add me on Steam - My steam name is OZKABOT 
All of the horror games i mentioned can also be found on Steam.
I hope that was useful. I’ve never been very good at giving drawing tips, so the best i can do is recommend sources for ideas 