Well, with a tech level in the mid-20th century there isn't all that much any of us could teach them (unless that someone happens to have a very good grounding in aerodynamics, industrial chemistry, semiconductor technology, or pharmaceuticals - I mean academic teaching/research level, so as to be able to understand their terminology and frame of reference and be able to create demonstrably working designs/specimens for them to duplicate).
However, with a deviation in 1604, Ebnglish, while not necessarily a major world language, would be understood by someone (if only an academic with a degree in European Studies, specialising in the obscure cultures of the Late Christian Era). In fact, your chances get better if you actually can talk to very few people. Meet the authorities, write down something and try to get it circulated as widely as you can. Someone will recognise it and talk to you. Once you become known, you can go on an esoteric lecture circuit and (with luck) get a book contract or three, and set up shop as a writer of alternate history or a cult leader, once you learned the language. It's not much, but it's a living, and no investigator can expose you for a fraud because you aren't (hey, if that Raelian guy and L Ron Hubbard could pull it off....)
Of course, being a prophet of doom from that horrible place where the THirty Years' War, the brutal conquest of the Americas, Napoleon, WWI, and the holocaust actually happenedmight not be enjoyable in a much nicer place, and there's always the chance you live out your life in the Son of Heaven's zoo or the People's Progressive Institution for Mental Hygiene '755