Move sidebar 2 to the left side of the page

Hi. I like this theme Yoko very much!
But I have 2 questions,

1. Is it possible to move the 2nd sidebar to the left?
I tried to move it to the left by changing the CSS code from this:
#content {
width: 75.669%;
float: left;
}

to this:
#content {
width: 75.669%;
float: right;
}

The sidebar moved to the left, but it’s not really on the left side, because I only moved the content. So now the sidebars is stuck to the content. But I would like to have it more to the left.

Is there a CSS code that I can use or any another way to solve this?
I’ve installed Jetpack.

2nd question:
Is it possible to make the main navigation sticky?

Btw, I’m an CSS rookie ??

This is the site: https://www.step-by-step-paleo.com