Removing "by author" and "comments" section

I’d like to remove the comments section my website and I’d also like to remove who it was posted by. I’m using the theme “Gallery”. I can’t find any option to turn off authorship. Like, it doesn’t show author on the front page, but when you click on the post it does.

Also, I see the option to turn off comments but when I uncheck allow comments in quick edit, instead of showing the comments section, it says “Comments Closed”. I’d like to remove that. Here’s my website: daeyeth.com. I’ve searched on this topic but I am having trouble finding solutions. So far, I haven’t been able to find the code when they say look for this specific line. Maybe it’s because of the theme I’m using? I’m a complete noob to this. Help please!

[posted already at https://www.ads-software.com/support/topic/id-like-to-remove-the-comments-section?replies=1 – please start only one topic per problem; please continue with the original topic]