Newbie needs advice on TESU degree-- after reading through these boards for days !

[Notgodot]

For most countries in Asia, you will need a bachelors (generally in anything) to teach, yes. But you will also almost certainly need some form of TEFL/TESOL training (Teaching English as a Foreign Language/Teaching English as a Second Language). I understand that you're not doing this to make money, but even many volunteer teaching positions will require some sort of TEFL/TESOL certification if you have no experience, to ensure you can actually teach. Here is one such course.

Many will require a CELTA certification instead of a TEFL/TESOL certification, which is a bit pricey, but very similar, except you must attend courses on-site. Here is one such course.

In addition, the top-end teaching positions will require you to have some sort of teaching certificate. Here is one such course.

Long story short, a bachelors is the biggest and most expensive piece of what you need, but it isn't the only piece.