Welcome to the forum!
Do you want constructive critism or a pat on the back? We dont normally improve with ego stroking. People here, the ones that take the time to really look at your pictures, are honest in what they say, no harm intended.
As stated, post 3-4 images, put spaces between each to make viewing easier, and add numbers so people can refer to them quickly.
I find overall, alot of the pictures are dark / under exposed, to the point where I don't see any detail in the tire area
You need to work on those backgrounds. Some are ok, but most need work. Some of the pics have a loading dock in the back which I dont find adds to the image and actually takes away from the car (pics 1,3,4).
The second pic has a tree line on top that also doesnt add much to the image. I like the use of the wall in the photo to create a line, but I'd probably like to see you get closer to the first car and end the line in the image with the last car, removing some dead space.
Shopping cart definatly has to go. But also, look in the back and you see another car, which removes again the impact and interest in the car / woman you are taking pictures of. Also, I'd like to see you get in closer and fill the frame with that red car / woman. If you were just quickly snapping, well, thats what it came out as, a quick snapshot, not a photograph.
There is one with a blue car's back where there is a yellow pole on the left...again, watch those backgrounds and subject placements
The front/back of the blue car is tilted to one side, check your horizon
The last one is probably my fave of the set. Its not as dark as the others, the composition and angle work. The issue I have with this one is whatever that is in the upper right hand corner. Would of been sweet with just the white band in the back.
Keep up the practice!!