Hey, welcome! Wow, off to a good start! Nice kit and great photo!
Since this is the critique forum, I will have to look hard to look for things!
Hm, are you sure the horizon is horizontal, and the verticals vertical? Seems there might be a little, ever so slight rotation to the left.
About the darkness of the photo.. Yes, maybe there is too much vignetting. Or maybe the car light trails are too "short" to sufficiently balance the darkness. Maybe you can add a touch of fill light, so the photo still feels like a night time photo, but not so dark that you lose detail. All that said, great photo, looking forward to see your developing skills