I Would like to give you some tips
1) Fix the low FPS (film in slowmotion, then speed it up) (i think its not possible with wmm
)
2) use shift + F
3) if you film a incam, the car should have a steering wheel
4) hopefully you could film not just one cars actions, but many cars , really racing for the win.
5) use different camera angles.
Theses ar my little suggestions, its your choice to take them into account or not
If this was a first try it's not so bad, if this wasnt your first try, not so good