remove "Post Comment" button and "Leave a Reply" text

I am new to WordPress and am struggling to remove all unnecessary boxes and text from my Posts pages. I would like to have nothing but the images of my projects.

I was able to remove the comment boxes (thanks to this helpful forum), but there’s still a “Leave a Reply” button and “Post Comment” text hanging around at the bottom of each page.

Is there a way I can alter the CSS to remove these items? I’m not comfortable with PHP.

Thank you in advance for any suggestions!