From a former realtor here are my tips & advice:
1. DON'T GET YOUR LICENSE!!
2. Before you even register for a pre licensing course, visit several brokerages (different companies) and ask what the fees are for new agents. Typical fees are brokerage, MLS, lockbox, office or desk use, legal. Also ask about commission splits. This means that for every sale you close, the commission is paid to the brokerage, they take their portion and give you the balance. For your portion, you will need to pay income taxes, health insurance, reimburse yourself for upfront marketing expenses and have some left for monthly expenses.
3. How is your selling & marketing skills. Are you VERY comfortable speaking with strangers, knocking on doors in your area, walking up to people, cold calling all the while informing people that you are in real estate and your goal is to get buyers and sellers to work with you and that you are better than anyone else they know.
4. Do you have a database of people you know personally that you can use to get them to work with you buying & selling real estate? If you have to resort to buying leads it is very expensive. Sorry, but it's not the broker's responsibility to provide leads for you. Brokers expect agents to get their own leads.
5. How long have you lived in your neighborhood? If you've lived there 5 yrs. or less, take time to drive thru every street, study every house, building, etc. Just know where everything is located.
6. When you visit the brokerages, ask how many realtors are in your county. This is your competition. Every realtor is going after the same sellers and buyers. Yes it's a cut throat industry. Once you're established after about 5 yrs. it gets easier.
7. Finally, how is your budget. As a realtor, you are self employed. With all the fees you will be required to pay upfront + marketing expenses, so you have enough cash to pay for all this. Bear in mind you will not receive any paychecks until you close a sale. This could take 6 - 12 months. If you work part time in real estate & full time at another job, it will take much longer. Also, it will be difficult explaining your part time status because buyers & sellers want full time realtors. They expect you to be available on their schedule - not yours.