As a former realtor, this is where it pays to have a strong background in sales and marketing. You need to have the ability to make cold calls, talk to strangers, advertise yourself to everybody you know. Start contacting people you know whether they are ready to move or not. They may know somebody who is. Talk to people in the grocery store while waiting on line. Ask the manager if you can set up a booth in the store to advertise. Visit rental buildings and give out your business cards to tenants. You need to work with buyers too.
One thing you need to learn - it's expensive if you have to pay for leads. You don't get paid until you close a deal so expect to spend months without any income. Hopefully you have plenty of savings. My advice - DO NOT SPEND YOUR SAVINGS QUICKLY.