Took a look at your listing, I think you have a place with a lot of potential. However your listing needs more. Find a friend who takes great photos and see if they’re help do some really nice photos for you. The ones you have are pretty low resolution and don’t give me a sense of the actual space.
You also need to add to your description. You need context for the location of your place and you need to put your guests into the space in their heads. Give them a sense of how it will feel and the different amenities in the building and neighborhood. Your listing should be as much about lifestyle as it is about the actual apartment. Imagine yourself as the guest looking at your place. Would you book?
Then maybe set ups some deals where if they book more than 7 days they get a slight discount. Even if you raise the price slightly daily to make up for it, people like to feel like they’re getting a deal.