How to fix the comment button on my website

Hi there, I have a child theme of 2011 running. I thought that fairly recently the button that lets readers leave a comment had the little thought bubble picture on it, but it’s blank. Any idea how to restore it? Also, how can I have a comment button or “Leave a comment” link at the bottom of my page?

https://www.ethanbodnaruk.com

I haven’t had time yet to edit down my stylesheet. I basically copied all the text from the parent theme over to this instead of just the bits I wanted to customize. (Originally I customized the parent theme and later realized I really had to create the child).

Thanks!
Ethan