Don't limit yourself and look at just the profit what you could earn out from steemit. I think that it is much more better to focus on your content to be original and to simply outpreform others. Profit will raise slowly when you get attention from people. Anyway you can simply go through first page there and see that some people are getting 500$+ per post and if you look their posts and that they post frequently, you can also check out their wallets. It will take effort to start and earn like some best people do outhere. But don't discourage when yo ustart and when you get slow attention, be patient, start small and bring good quality content. Honestly I read most voted posts mostly since thats what community is telling me that they are not crap and so far my experience as a reader are great there.