I was planning on doing something like this as well. I was watching someone on youtube and they did something like this along with getting live traps and it seemed to fix his problem.
Stone tile around coop - safe? - Page 2
I am not handy with tools either. Bought an electric stapler - LOVE IT! You can staple your wire mesh to the wood!! It is pretty sturdy.
I would not suggest you bury the wire mesh - mine is just extended one foot from the coop and I put some sand on top and then lined stepping stones on top of that. Have had no problem and we have MANY raccoon as I live on the river! They are strong and clever, but tend to dig at the bottom of the coop where it touches the ground - haven't figured out that they should begin digging a foot away from where they want to enter.
Good luck, Pat Corona