Try not to be lazy when syncing up your video. Cutting to the song is one thing, but making the cuts and the clip itself sync with the music is another. That effort shows and makes your video better.

On color correction, remember that the word is correction, meaning it alters or enhances the image. Yours looks like there's color slapped on top of the original video. Play around more with curves, then expand from there.

Good job finishing a video this long, it's tough. Good luck in your future videos.