I also got the same results as you on my first month, no one even replied to my buyer requests. It takes time to know how to respond to buyer requests as the response strategy varies from one industry to another. If there are more seller than buyers in what you are offering, maybe you need to rethink your gig. For example, instead of removing a background from the images only (as you are doing now), maybe try to offer a video too. A video of a series of photos without background. This will allow you to tap other customers (eg those who want to promote products on social media) so that you can have more buyer requests to respond to. This is just an example. Also research your competitors. Try to offer something better than them.
Also, I am curious to know why you decided to bold every word in the gig description instead of the key selling points. (i am reffering to your best selling gig)
I wish you all the best.