Welcome to Real Estate. As a new agent, getting clients and learning your business is your full time job. The more you learn, the more prepared you'll be when you have your first several clients.
My first lead was from my broker. A buyer with a difficult situation. I never did sell them a house, but they referred two others to me who did.
Start with people who already know, like and trust you. Let them know about your new adventure. Consider focusing on first time buyers, they will know less then you in most cases and be open to your help. Sit some open houses, shadow some experienced agents on appointments to learn all you can, just don't "help" unless asked to.