How long it takes to rent duplex near Cambridge?

[Mimi Zhu]

Hello, I am very new to real estate. I just bought my first investment property, a duplex close to Cambridge. I plan to do some renovations for the following month and hope to rent both units out starting in April. Is it realistic? How long usually does it take to rent a duplex out near Cambridge? How early should I start advertising? Any advise would be greatly appreciated!