I dont know so much about this to be honest.
I can be wrong, but one of the ways i use to grow, slowly but steady is to use all the steemit dollar i earn and convert them in to steemit power.
That way it is my hope that my upvotes will give more, and that my own power on steemit will gow faster by doing that. :)
But as i say, i am pretty new at this, so that is just one of the ways i hope this work.
I still believe the very best way is to only write about things you truly find interesting your self, because if you are passionate by something, you tend to write much better about it, and that again make it more interesting for other to read.
In the beginning it can be tempting to kind of hunt for something to write about, just to get some posts out there. Those kind of post seldom become very good.
It when you come to think about something and you get a "ahhh, yes yes! this is something i just have to share" moment, and you think it is so interesting that you just have to let other people know about it.
That is when you will write the good posts that will be interesting for other to read also. :)