If you have some skills such as writing , designing , developing websites or apps then you could offer like a service on the forums for BTC or you could simply rank up with time and that could take a while until you reach full member rank and enroll into the sig campaigns to advertise other services and get paid for it.
AS I M A NEW MEMBER WHAT SHOULD I DO FIRST. AND I DONT HAVE ANY WRITING SKILL . HOW CAN I BE READY FOR TWITTER CAMPAIN .PLEASE TELL ME...
You could improve your writing skills, or see if anyone is interested for you to post in your native language. I'd suggest improving your writing skills, because even when you get to a higher rank, signature campaigns want to recruit people with decent writing skills.
Alternatively, if you know how to code or design, which don't need extensive writing skills, you could try to make profit off those.