Thanks for responding Yosemite!
Actually I have 2 wordpresses installed. The first one I installed in the main directory in public_html. I tried to install another one to see if it worked, and I installed it under the directory wordpress (the options-reading didn’t work for this one too). So you just told me to login to the one in the wordpress directory, the second one I installed, one I don’t care about and am going to delete. This one is not connected to the index.php that you just saw.
So for my main blog under the admin url of https://little-hypotenuse.com/wp-admin, my general options are this:
wordpress address: https://little-hypotenuse.com
blog address: https://little-hypotenuse.com/index.php.
The index.php is specified because little-hypotenuse.com right now leads directly to index.html, where my site has greymatter installed and not wordpress. I am making a transition.
So all of that seems correct right?
And by the way, I do have a .htaccess, but my FTP won’t show it. I see it in my cpanel file directory, but I don’t know how to actually open it to view it. And I don’t even know if this has anything to do with .htaccess because I don’t even get what that is.
Sorry for writing so much, thank you!