Valygrl has a lot of good advice.

Many, many things have to go right to be able to cross the country in 30 days (and you might not have 30 to devote just to riding). And the focus of such a trip will be almost 100% on riding. Given your lack of experience, you are already behind.

A less ambitious trip will allow time to deal with problems you might encounter as well as allowing changes of plans to take advantage of opportunities you might run across.