Newbie question, how do I convert Steem Dollars into Steem Power?

Hey all!
A few questions,

1. How do I convert Steem Dollars into Steem Power?
2. Do I want to?

• It seems like Steem Power is the way to go.
  I've heard things like it gradually makes you more SBD over time but it takes a matter of years, but is that based on your investment into Steem Power having a higher return? Or is that meaning that if you interact a lot your stuff is just worth more, so you will likely make more?

1. What is the benefit of not converting to Steem Powers?

This is my current wallet: