Is it workable in reality, to just buy a plane ticket and move to Europe and start over from the bottom?
If that's too far fetched, maybe still in the USA, where can a person just go and find a job on the spot, along with it being a place with lots of young people
If you have some spare cash to last you a week or two, untill you find a job, then why not? There are a lot of circumstances like what you have studied, how much spare money do you have, do you have a specific country in Europe in mind etc. In some places it's easy to find a job in specific industries, overall it's kinda hard to find another unskilled job.... If to can freelance Eastern Europe is the place. It's cheap, it's fun, it's crazy and you if you can make good money with your laptop, yoy can live a very good life here. If you can't freelance, but have studied IT, it's the same deal. If you are in some other girls, it's better in the West.
You make it sound like working visas and permits aren't a necessary thing.