Making good money as a real estate agent is part skill, part charm, and part luck. All the skill and charm in the world won't help you if the only properties you have to sell are worth nothing, and all the most valuable properties are no use to you if you don't have the sales skill and charisma to persuade someone to take them off your hands.
Like insurance salespeople, real estate agents have a bad reputation. Also like insurance salespeople, they don't care. They make a commission on every piece of land or property they sell, and if it's a large house, it can be tens of thousands of dollars on every sale. You don't need any qualifications to become a real estate agent - just excellent people skills and probably a strong track record in sales from previous employment.