A number of months ago, I read an article in a quilt magazine, I believe it was written by Kawfee Fawcett ... (sp?) ... he was talking about a "muse" ...
basically, he was saying if you go to a task, pursue the accomplishment, even if you don't feel like you know what you are doing, "something" starts inputting information to your brain and you will find yourself being "led" toward a better product, activity.
You can see <g> by availing yourself of the tools at your disposal, your abilities and imagination will be enlarged in direct proportion to the amount of time you spend actually trying to accomplish something.
Don't you suppose? one of the reasons we keep moving on to the next quilt is because we learned something that intrigued us enough to keep trying something more?
I think you have done a good job on your first long-arm quilted masterpiece .. a grand job!
In time, you will find your own "voice" and then you will feel more comfortable working on just about anything ... <wave>