Ahhh, I remember those days!
You have to have a really good proposal (not a canned response!), quick response to clients messages, and hopefully something in your portfolio to show your previous work completed elsewhere.
When starting out, you can't expect to charge top-dollar. You will have to start with small jobs, and bid slightly less then others.
Do great, fast work, with great communication, and keep working until the client is happy.
THEN you will get the good feedback you are after. It takes time and hard work (like everything else!) but it pays off in the end!