For a beginner, like me, I think you are off to a good start.I suggest the old addage: practice makes perfect. Try to model the car using many different techniques and keep track of what works and what doesn't. Revise and refine your techniques by experimenting. It may not be the quick and easy solution, but that is probably the best way to become good at it. In 6 months or so you may look at such a model as trivial.... :) I like you would like to become an expert modeller, but a little thing keeps holding me back.... time! :) Anyway, enjoy the experience, it is worth it.