My father passed away and his Will is going to probate . I live in another state, how do I contest?

My father whom I never had a typical relationship with passed away. I heard his assets are going into probate. My step mother whom I have no contact with is hoping no one contests the will. I don’t know what’s in the will but by her behavior I am assuming their are assets that she’s hoping to be the sole heir to. I live on the other side of the country, who do I contact to get information on what’s in the Will, my chances of getting part of the assists?