I spent 7 years on my 4 year degree for vaguely similar reasons. I didn’t take breaks. I pushed through and cracked and failed and started over in a new major and a new school. That was nearly a decade ago and I’m not really happy with where it lead me. I wish I had taken the time off. If I could go back now with my current knowledge of how my brain works differently, I would be so much more successful. I’m also just rambling at this point.
I guess what I’m trying to say is be kind to yourself over the choices to have made. Not only can you rarely ever take them back, the grass is rarely ever actually greener on the other side.
One class for one hour is not much time at all. To get the most out of it, I would actually try to keep the scope as narrow as possible. I would really dig into these two things:
Password management (make good passwords, use a pw-manager to avoid reusing a pw, change passwords regularly)
Spotting social engineering (I would spend at least 2/3 of the class on this topic) this is by far the most common vector through which people get hurt by poor tech literacy. If you want to do the most good for the most people I would recommend focusing on drilling this skill.