Welcome to steemit @rjshariful!
I wish you all the best for the time you will spend here.
Don´t be shy! Try your writing skills and publish good photographies and pictures of the kind you would like to see.
It´s sometimes hard to find a way here but if you are persistant you will find a place.

There are so many tutorials and help page that you can easy become lost. The one and only tip that matters in the biginning is this. Threat and write about other people as you like them to write or treat about you. Thes rest will come with time.

To give you a good start i give you a good welcome vote with the steam power I got so far;-)