Mutated Bugs and Game Assets!

For this project I am the vision keeper and concept artist. Not gonna lie, I've never created concept art before so I feel like I am winging it. After today's coaching they want me to create environment concept art. I have 7 years of art classes and a FETAC level 5 i art, craft and design but not once have I created environment art. I spent 7 years in a classroom, drawing what is in front of me. Nope I have to use that skill and draw whats inside my head. I have the imagination and I can visualize the world and characters clear but the challenge is getting that onto paper. The first thing I did was sketch mutated bugs and Assets that could be used in the environment. Below are sketches from my sketchbook: