Your stars have short trails from a bit to long of an exposure time, but you have some significant light pollution to overcome.
The holy grail is to have nice round stars.
In the first one it looks like a firefly flew through your shot leaving some green streaks. One streak is between the camera and the tree.
Other than that they look OK.
I cropped and annotated that part of Sagittarius that is the top and spout of the 'teapot' and the surrounding area pointing out the major sights that amateur astronomers look at in their telescopes. I also put an X on the approximate point that way back in the background, 26,000 light years away, behind gas and dust so we can't see it visually - is the center of the Milky Way. Sagittarius A
* (pronounced "Sagittarius A-star", abbreviated Sgr A*) is the supermassive black hole that is at the center of our galaxy. Sgr A
* is estimated to have a mass = to 4.1 million of our sun.
Sgr A* is monitored on a daily basis by the X-ray telescope of the
Swift satellite.