Hi! As others have said, you will need to speak to an attorney. Did you work with an attorney to handle the will? That person would probably be a good resource.
To sell the property, you'll need the signatures of all owners, if the house was left to more than just yourself.
You can sell the house without doing any improvements, but there are things you can do to make the house more salable with minimal effort. Those things can result in a quicker sale and/or more money.
The first thing to do is to check with the attorney to make sure you sell the house. Pinkston and Associates is a great firm to work with on real estate matters, though you may need to talk to a probate specialist.
The next thing is to is to decide your priorities. The house will need to look great to compete in today's market place, or you will need to sell it below market value. People are looking for deals out there, and selling it below market could get it off your hands faster.
I can provide a free home valuation if you would like with no obligation. Feel free to click on my profile and call or email me with more details about your home.