IS English is Necessary for Earning on Steemit | Posts Earning Goes Down

I am using the Steemit because I heard a lot about it on the social media site like YouTube.
I have seen a lot of peoples who are saying that they have make 1000$ from posting a single
posts on steemit. Firstly, I do not believe this because it look like scam, like i posts about 60
but i only receive 22$ and it can be a reason that i do not have enough steem power.But What
I can do because I do not have money to buy Steam power. According to the rules, if I have
more steam power then i can be able to earn more steam power and also curatation rewards.

Even watching a lot of Steemit related videos, I do not understand how steemit site generate
revenue and how he pays to me because for some kind of posts i earn only 0.02$ and for some
posts I earn about 0.06$ and for some pots I earn about 22$.Even I have same or even more likes
my posts earning is different. This can be a reason that I am not the native speaker of English
and I am from Pakistan but I can understand English some how.

I love Steemit but their paying to posts are going down day by day, I do not know why?