Doodlebugs are a great subject and I hope to see more of them - especially so nicely done. I remember a neighbor had one back in the early 60's and lost the gas cap out in his field - I was the one who found it and was rewarded with a quarter.
Absolutely calls for a tutorial - like you I'm not so tech savvy but I have a printer, photo editing and ready to try this out since I have a Minicraft Mercedes in the pipeline. How did you remove the paper backing after the printing?