This is my first try at long exposure photography.
I only took one photo and got lucky.
To be honest I don't know if it's a good photo or do I like it because it's one of my own?
I would have either shown more of that rock or remove it altogether.
Check this site - Abbye Dahl Photography - Not a Moment in Time, But the Passage of Time DARK section, the author is a pro specialising in this sort of shots, you can use it as a reference. I just learned about her yesterday. She is a forum member and may give you some good advice.