The angles you are using are good. You've got a great start!
The car, however, could be less centered. If you have some environment in the shot, it could make a world of difference. Try zooming out a bit more (or move farther away) and pan a little to the side. It's all about expirimentation.
The second shot has a good angle, do some of what I said above, and also lower the shutter speed. It appears to be at it's highest setting. If you lower it to 1/60 or 1/125, it will add some motion to the shot and make it exciting. It could also help in getting rid of some of the patchy water. Be advised though; when you are zoomed in quite a bit, some of the motion is lost, and the picture seems slower. When you are zoomed out, it seems faster. Try experimenting with that to get different results.
Take a couple of my pictures for example:
This one is zoomed in quite a bit. Notice how it seems there is very little motion in the shot. The road doesn't have much motion blur.
Now look at this shot:
In this shot, I was pretty close to the car, and then zoomed out a ways. Now when you look at the ground, there is a significant amount of motion blur.
Also, notice how neither of the pictures have the car completely centered. This adds a bit of dynamics to the photo and makes it interesting. I have also edited my photos a bit, but I would wait to do any post-editing until you are comfortable taking pictures.
There are also some expansive tutorials over the basics and advanced techniques with Photomode in the forums. Check them out. They are very helpful.
Hope this helps! 👍
