I hope you dont mind another "short" message :)

I figured that you may not ever know what steem power and steem dollar is and how to use it on steemit for your own benefit.

Check out this article (not mine, but very well written):
https://steemit.com/steem/@kevinwong/why-should-you-consider-accumulating-steem-power

Also if this is not enough then another good explanation can be found here: https://99bitcoins.com/making-money-with-steemit-steem-dollars-and-steem-power-explained/

You can find loads of good material also you youtube. 

Let me underline why in my opinion it is important to power up your "steem power". At the beginning you will start your adventure on steemit as so called "minnows". Which simply means that you are "nobody". That's how I see it.
Most of those who invested into steem power are helping (SP) also those who have some SP and they help and benefit each other by upvoting their own posts.
If you have no steem power then your upvote has absolutely no value which make things more difficult, as many bigger players only will not treat you seriously.
That's anyway my own impression here so far.

Cheers, Piotr