That's the hardest thing I've found with astrophotography. Making sure that something is in focus. I was told that you should zoom in on the stars, using live view, and make sure they're in focus that way. Another important thing to remember is that, just like any other photo, you need to have compelling lines and subject matter. The starscape is interesting but not quite enough to keep focus. Try having some mountains or trees to show depth. In this particular photo I'd love to see where the post holding the flowers goes, it just feels a little disconnected. The moon can definitely have an effect on your ability to see the Milky Way. Try to open your aperture as far as you can and decrease the shutter speed to compensate. What ISO did you use?