Gig improvement can only help you if there is a demand for what you do. There isn’t. How do I know this? Because after doing a basic search I can see that literally thousands of Fiverr sellers are also selling what you’re selling.
You can do this research, too, and you should – BEFORE you create a gig.
You can improve your gig by keep changing on it. Check too sellers gig read there discrepsions and maintain your gig like