Hi, congratulations on your site
You can make a good use of the Container element, so that your content stays in the grid and centered on the site.
Drag a container here and put the text inside it, you'll see how it nicely gets centered after that.
And to make your text a little less dense, try to spread it into 3 paragraph, and give the container parent a column attribute with a value of 2, this will make nice columns and make the text easier to read.
Also it's not customary to hide the menu item of the page you're on, it's a little confusing. Instead, style the one of the page you're designing, it will have the Current attribute close to its class name. Give it a different color, and you'll see items take this color when the page related to them is loaded.
Hope this helps!