The most recession, 9/11 and CoVID proof qualification I have is a truck licence (Heavy rigid first then semi trailer).
Got the heavy rigid truck licence in mid 90's when the local Tafe did it for $300. I know they are much more expensive now (in Sydney you can get the licence for $1000 atm).
Truck driving isn't glamorous nor will you make a fortune but if you look on Seek right now, you will still see a ton of truck driving jobs. No digging holes or stacking shelves. Air conditioned comfort and listen to music all day.
My main point being is the training won't take 3 years like a degree (usually just 1 or 2 days) and you don't really need to have any sort of currency. It's also a lot cheaper than Uni.