Today I installed WordPress! I did a manual installation.
It was straightforward for the most part, until I tried making my first blog post. When I tried submitting my first post (the very one you’re looking at now), WordPress would respond with “Publishing failed. You are probably offline.”
I found the answer to my issue with this simple to-the-point video below! I specifically needed to add a plugin called “Really Simple SSL” (see video at about 3:10).