Be patient. You can’t expect immediate success. Treat your gigs like a business, and you will have a better chance at earning sales. This means marketing and promoting your business.
And yes, it could take a month or more until you earn your first sale. That is how business works. Fiverr is NOT a get-rich-quick website. It will take time – sometimes a long time – before you become successful. How successful you become, though, depends upon how much work you put into making your gig look fantastic, and reaching out to your target customers.