Welcome to Steemit!

I can see you've already put some effort into this and created a nice steemit sign for your photo :)

I think it's best to post fewer, but high quality posts. So maybe one post every 2-3 days, depending on your writing speed and skill.

And as to how much money you can expect: it really depends. Not everyone's vote is equal, so one person's vote might give you 1 cent while another person's vote can give you $10 with one click.
It depends on their steem power (the amount of steem currency that they have in their account)

But anyway, don't worry about the money side of things too much for now. Write a couple of posts, get a feel for the platform, connect with others, and you will soon discover how fun steemit is!