However, mice are good climbers and cats are good solutions! Anything you can do to respond to the other concerns will benefit you. Definitely paint and decorate with an eye to maximizing light if that is an issue for this unit.
You should also note the advantages of your location when it comes to moving in and out, hauling groceries, letting the dog out. I hope the building is dog friendly because that helps your location as well.
You're in Queens, also, where as we know most housing is houses that are accessed from the ground floor anyway. (Out-of-state brokers don't know this, and they also don't know that there is a strong market in NYC for one bedroom apartments; that is not a worry around here.)
All that said, you probably paid less for your home because it's on the first floor. Future buyers for your property will expect the same consideration.
Karla Harby VP
Rutenberg Realty New York City