sidebar cut off

GAR! So, here is my blog: https://thebuckwheater.com/

Though I have adjusted the theme on lubith MANY A TIME I’m still getting parts of my blog cut-off. It’s not very noticeable, but I want to fix it and I don’t know how. When I click some of my pictures in order to maximize it, I only get to see half the picture. Also, part of my side bar is cut off as if it’s running out of room…. Any suggestions on how to fix this? I’m kind of new at this.