you can take knowledge of internet and than you can go in usa because in usa is very big and many states , you want to go usa you are belonging other country you need passport visa and plane tickets. it is compulsory for travelling.
Apply for a nonimmigrant visa if you want to visit the U.S. temporarily. You can apply in person at a U.S. Embassy or Consulate, or apply for a nonimmigrant visa online, and schedule an interview at the embassy or consulate.