Have you signed up with a broker yet? If so, did they tell you what fees you would incur to get started? Depending on your broker's policies, "start-up" fees could include joining a board of realtors (approximately $350 - yearly); multiple listing service (approximately $60 bi-yearly); lockbox key pad (if applicable) (approximately @ $70 bi-yearly); errors and omissions insurance (varies by broker; I pay approx. $500 a year); personal marketing materials [business cards, etc] (costs vary).
If I remember correctly, I spent approximately $1000-$1500 to get started.
Welcome to real estate and good luck in the future.