A good chop for a beginner!
You have not made big changes, you are focused on small changes. Good!
Here are some typical beginner's mistake.
- Bumper is a well laid out, but little in the wrong angle (shown too much toward the sky).
- Old tires have been displayed next to the new.
- Background shows the rear tire and the bumper between.
- The color is changed quite well, but you are also colored chrome parts, and the color is a bit saturated.
The work is not at all bad about, as you may understand my comment, I just wanted to tell you what you should pay attention to the following works. You should also choose the larger bases, because it makes it easier to work (at least 1600x1200).
Keep it up dude!