Why I feel the tracks are so small and narrow in the screen?

Ok, I will try. Thanks a lot for all your guys' help!!!

 

If you're referring to the idea that blue colors are bad for your eyesight, then that's a myth.

 

I couldn't find this in nVidia control panel. You can adjust 3D-rendering-related settings for a selected program if you want, but not color balance and all that stuff - these are applied universally everywhere.

From my understanding, even if you aren't completely satisfied with either of the mood files and are going to adjust colors further, it's still better to at least switch to realistic.mood because it has better base color balance. For example, Raceroom Remastered Reshade uses this mood for its latest variant (4.1).

(Upd: Standard_day also looks quite good to start with.)