How will income from a rental property affect my taxes?

Right now I'm making $30,000 a year from an employer and have 4 kids. Right now I'm at zero taxable income when I fille taxes. I want to get a rental which I would rent out for about $750 a month. About $500 a month would be going towards the mortage on the rental and property management fees. How would all this work next year when I file my taxes?