At this moment Iam earning bitcoin from bitcointalk forum but Iam hoping that I will earn bitcoin from trading after few weeks..
Slow down mate, you are new in the forum. Its better you learn the basics of bitcoin and how it works and also the administration of the forum. Quality of posts should be maintained and worked on so you can enroll in signature campaigns later.
I would not recommend trading right away since you need to learn the basics of trading first. Do some research on how trading works and how people earn from it. Analysis of past markets is a must before you jump into the fray.
Agreed trading is not an easy task especially for those who are new in bitcoin community so its better to do a good research before entering into trading as only one wrong move can make you to go through huge losses and that would not be affordable for average earning person.