Hey thanks for this post,it is so clear and am happy you wrote it.
I feel like something has been lifted off me,i have looked for this info for almost a month and am glad you explained very well and guess what,i did my first transaction on Steemit....

I had 0.239 Steem dollars and it converted to 0.196 Steem and finally that converted into 0.927 Steem Power.

I feel like a god..!!! hats off to you.