How long did it take you to get more sales after your first one, im over the moon that i got a sale
They will start comming in slowly just make sure you keep all your customers happy and they will come back to order more
All you Need is here :
Congratulations on your first success in Fiverr…
Congratulations! for your first sale.
Be patient, it will take some time.
I think you should promote your gig, here are tips to promote
Put short discription about your gig and the link to your gig.