Continue Reading Button & Sidebar at Bottom

I just switched to Baskerville and my homepage is now a mess! The full text of each of my posts is displayed on the homepage. I want just a few lines of text and then the continue reading button but have no idea how to add it? I don’t know anything about coding (now’s the time to start) so please explain simply?!

Also, my “Sidebar” is now right at the bottom of my homepage. Any ideas on how to change this?

Thank-you!

milliekiff.wordpress.com