✔ 最佳答案
You must have serious skills and experience in MANY languages, something you can only achieve with years.
The freelancing market is oversaturated, and the competition is a cut-throat.
Register with odesk and frelancer.com, read what clients want. If you can say, honnestly, "I can do that", then offer your services.
Warning: you may need to apply to 100's of jobs before you gat any chance to get one.
But if you hope to make a living out of it, forget it.
You will be better off applying as a junior to a large firm, well established. (At least, you will have a salary!)