I have audited courses just to learn about the subject, so I get why you might take a different route thru school. Unique paths lead to unique places. My husband had GIS as his minor and he prolly wouldn't say he has zero regrets with his schooling and career, but after some difficulty on the job market years ago, he landed a nice career with all the needed fundamentals in a field that he is passionate about -- and his work has a significant positive impact for the world. In fact, for years, he was shuffled around in various fields from agriculture to forestry, until he found something he really loved and believes in. So, for what its worth, just try to remember that sometimes it seems like you will never get to where you want to be, and sometimes you never do get to that place you thought you wanted... then sometimes you reach this point in time where you look back and realize how even when things were really bleak, it all brought you to this surprising, but really awesome, unexpected place you never even saw as a possibility.
Please try to be a little patient with yourself, and a little forgiving too. These are really trying times for everyone, and I don't just mean the pandemic and the job market. At least for me, I am finding it hard not to be snappish with my family at times. I have about had it with being stuck at home with my hubby, no matter how much I love the guy. And I know my anxiety is just ridiculous right now. I'm struggling too. I don't say all that to hijack your thread. I don't have any sage advice for you (or anyone) at all, but sometimes its just nice to know that others can relate a bit.
So again, be patient and kind to yourself. Getting out if school and into the job market is tough any time, but right now especially! I can't even imagine what you are going thru.
And for the record... i have no idea why anyone would start from the walls first. I am with you. Totally start with the ceiling.