Hey Alex good onya for posting
We all start out like that, even when we're not trying to
. How accurate do you get your polar alignment? Definately try a slower ISO it will help a great deal with the graininess but unfortunately it will be worse for star trailing to achieve the same level of exposure, unless you get your alignment pretty accurate. And that doesn't take into account periodic error in your drives.
Have you posted a "shot of your rig" and a broad discription of your equipment? If others here can see what you're working with then we can offer more relevant suggestions.
Nice to see the astrophotography bug spreading