Honda fit/jazz (GD)

now i currently still scratch modelling of Honda Fit/Jazz GD to put it on the games called Assetto Corsa,
here's the exterior, not much detailed but already represent the shape


rendered ingame

i prefer to modelling on low-poly because i plan to put in a game (because putting high poly will turn down the FPS. CMIIW) beside my PC maybe kinda outdated (i3 2.9 ghz, and only 2gb of ram).

thank you.. please give some advice to me :)