Hello tanvirhossain366, And welcome to the BTC world
There are already many threads Running here, if you can simply go through other threads you will get the Idea how this forum work and How you can earn money from this forum. But still if you dont have time i can do this for you.
You can earn money in Different ways from this Forum
By Joining any Signature campaign here.
How to Join a signature campaign >> Just go to service section and Check the Signature campaign in that Section. You will Different Signature campaigns threads. And You will also see the Different pay scale levels for the Different Level.
On this Forum there are different Activity level which will increase as your account gets older, and As your activity will increases your pay scale also will increases.
So Dont get panic in the beginning on seeing the pay scale, Just do hard work here to get some nice activity level & Try to gain some Knowledge about this forum.
Other Money earning method is if you dont have skill there is section called Gambling>> Games and rounds On this Section there are free giving away of BTCs Where you are able to earn some free BTCs.
If you Have Skills to offer, you can earn alot from this section >> Service .... On this section you can offer your skills like Graphic designing, Web designing, Promotions, SEO, Signature Designs etc etc
Try to read these Threads too:
TUTORIAL: How to Earn Bitcoins for Newbies!>>
https://bitcointalksearch.org/topic/tutorial-earn-bitcoins-here-1244332[New] What is a Sig Campaign?>>
https://bitcointalksearch.org/topic/new-what-is-a-sig-campaign-1352964Best way to earn Bitcoins? >>
https://bitcointalksearch.org/topic/best-way-to-earn-bitcoins-1006151How can I earn money in this forum?>>
https://bitcointalksearch.org/topic/how-can-i-earn-money-in-this-forum-1144701