

I think that the problem is that you are being too smart rather than dumb. I think you are grossly overestimating the amount of thought that a good portion of consumers put into their purchases. Don’t forget, people didn’t just buy the cyber truck, many even bought it as a status symbol. Even worse is that some people are still buying them.
How do people do it? Simple, they don’t. It’s only because of your ADHD that you’re staying afloat as much as you are. You are literally trying to accomplish the same amount as 3 people, so ya, you are going to learn slower.
Of course, none of that helps you right this moment… I would start by confessing to the people around you including your fiance that you have fucked up and are in the process of finding out. Give them a date this semester ends and beg them to help where they can until then.
Someone else mentioned study groups, I have found that actively studying with others and discussing what you’re working on is a massive boon. Are any of your classes online or do you have a way to communicate with your fellow students? Post on there that you have ADHD and are looking for study buddies. I 100%guarantee that there are other people who have ADHD or are struggling.
Do you commute or have other times where you have forced “down time”? I find that chagpt’s phone app with the voice chat feature is amazing for helping me learn new stuff. As I am driving, I can ask it to explain stuff and if I don’t quite get it. I can ask it to explain it again in simpler terms. I can focus in on things that I am interested in or don’t understand. Then once I have a better grasp on the little pieces I’m not embarrassed to ask it to explain it all again. I can also get it to review course information with me. You can ask it to let you tell it what you know and have it correct things you are getting wrong.