@Vincenzo -- what to do after passing the exam also involves doing some research. In most areas, you can have a real estate license and it will do you little good when it comes to selling residential real estate. Why? Because you have to join the National Association of Realtors, your state Realtors association and the local one in order to access the multiple listings service -- the "go to" spot to search for homes.
Without that MLS access, becoming a residential real estate agent is a tough row to hoe. While thinking about a real estate license, then, you'd better get ready to research what you'll have to do in your local area to access the markets that you'll need to list and show properties.
Again, the test is rather easy. What comes after it is much tougher.