I'll ask a couple of questions. which will also probably help in their website editing. With a minimum level of programming

1)Where in the code. Find and change the element "big picture where the article is or delete it altogether 600x600)" https://onegreen.pro/onegreen

2)How to make it open the page that lies in the root of the folder (my page (site map), etc.)? 

404 error not opening unrelated page

3) 

Telegram does not have a "social links" icon.
where to place the icon to use. In the new update, create a lot of use telegram

2)I created a 1.html file at the root

when you try to open https://onegreen.pro/1.html, a 404 error occurs. The script does not allow you to open the page, although it exists

Thanks for the tip, I hope it doesn't hurt. I use a translator so there may be errors

source_code/public  i can't find where

change translate calendar?

post

5. search stopped working on a mobile device (just refreshes when clicked)

did not change anything, from the update or how to fix it?

thanks for the advice, sorry, but I'll ask again)

1а) by page speed? this is normal
suddenly you will be in further updates, maybe you need to improve the "Open Efficiency Map"

2b) where to translate comments in the code.
 2c) I can make a calendar in different languages. or better not to take)

3a)

need to delete "viewed recently"
where to do this from all posts?
file location

tell me what resolution of the logo to do?

 since the minimized PC window is very bad

in which file to delete, in the code 
FEATURE Coments

Thanks, I removed it in the code, it's more beautiful.

1) Can I remove the menu item on the PC version?

2) about the logo. I pasted different sizes of the logo
PC, tablet, smartphone

you have a site prototype that fits perfectly in the size of the window. my logo shrinks when i move the window
look https://onegreen.pro/
what pixels are needed, i will do

"1. Yes,you can leave an empty menu in setting"

 can i completely remove this element from  where it is in the code

A lot of fonts do not work in Ukrainian or Russian, do you know that?

only in english