If you went through school without learning anything, it means you're a normal person.
Don't worry too much. What you need from your school is a degree, not an education. You do your own education. The degree doesn't mean you know anything: it only tells your employer you were patient and dogged enough to sit through boring classes and terrible teachers all the way through.
That's the real value for your future boss: they like someone who can withstand and survive the idiocy of the workplace. You getting your degree is reasonable proof that you won't be a snowflake and leave them hanging when the going gets a little tough.
But make no mistake: you know nothing out of school. Nobody does. All employers know that. The best you can hope to get out of school is the ability to learn all the rest quickly after you're hired.
I'm tempted to try Ubuntu Touch. But I want to buy a second-hand Fairphone 4 to try it on, and other OSes possibly - because I don't want to waste the CalyxOS install that's running fine on mine right now - and I haven't found a good second-hand one yet.