You have to do the main shape, as clean and simply as possible without details at all first, then you check with references pics if you respect all proportions. Only after that you add subdivision and details.
Not sure what those orange lights actually do IRL. So for now I'll assume they're just turn-signals mounted on the roof. Because that's what they look like they should be - and they're getting completely remodelled later on anyway.
Just like this: Don't do a 2D shape & extrude it like you have been doing, but start going from the roof down to the bottom of the car
Testing out some new bits of code to the devs awesome improved tonemapping. Abit strong atm but its getting closer to my liking
More stuff being added (rear antenna, running boards, front bumper, etc.) Getting more realistic weight for roof rack accessories. Chassis Stiffening (100mph head-on crash)