Visitor Visa - B2

I have almost completed my application for USA visa ( B2 ) and paid the Visa fees for it. I don't have have a very amazing travel history in the past 5 years I have been to Turkey. I also don't know many people in USA. I just had a friend whose address I have given in the form as the form is asking for the details of the person whom you know.
traveling is my hobby and this year my husband did not get holidays but I planned USA trip all alone.
I am worried about what they will ask in interview?
Will it be a problem if i am going alone without husband?
Will it be an issue if i my husband is not accompanying me?
What documents shall i carry along with me in the interview?
will it be positive point if i am still studying and in my last semester of masters?

Please guide me as i am confused and just dont want5 my visa to get rejected.