It is really difficult for people to start freelancing with zero experience.
The best way is to start from a small freelancing website gain good experience create a Pretty good portfolio and represent that on Big Freelancing communities like , Fiverr, Freelancer etc.
Let me suggest...
These tips are really helpful, being a freelancer on Fiverr i have experienced that consistency is the thing which matters the most, if you have received an order complete it as soon as possible and respond the upcoming messages quickly.
You just need to convince the buyer with your services.