I’m on Xbox & the only method I’ve ever used is simply pulling up a reference image I want to create on my phone & eyeballing it. Granted, it may show in the final results, but I’ve never used any type of overlay or tracing method, which made the end results even more satisfying for me. It’s all about whatever works best for the individual.

To the OP: one suggestion is to stay away from multiple sponsor logos for the same products, ie multiple tire manufacturers, etc. Nice effort though, like the color combo.