FTP client and theme install

Hi all,
New to wordpress.

Recently was given access to our server on which we have wordpress installed. I have been trying to upload a new theme for a while.
Was told that I should do it through an FTP client. I am using Total Commander.
When I connect to the server and the wordpress site, however, I cannot see any files. There is no “wp-admin” file, and no directories of any kind.

Currently, everything I move to this wordpress site shows up in media. So if I move a theme zip file, it shows up in media as a zip file. Not helpful.

I have had some success installing themes the regular way, but get stuck with the cheatin’ error. All the fixes for this error require me to have access to the wordpress directories…so it’s kind of a catch-22.
Any guidance would be appreciated…
Thank you!

//Also, please note: am newbie regarding programming, but am willing to research, and have access to a smart IT person (but he lives far far away, and is difficult to contact–hence why I am on this forum).