Hi salam guys , steeemit work

I dont know now
how to earn coin from steemit
I have totally new on steemit
& dont have any folower on my profile
How to get a follower on steemit
I learn something
Example steemit earn
Steemit write
Steem coin
What system on buy steem coin ??
I need to know all subject on steemit
How can find steemit best writer ?