I will love the idea if you are able to, somehow, offer the training/testing in languages other than English. PostgreSQL is an international open source project and English-only training/testing is not very appropriate. This gives a huge advantage to the
community's native English speakers (the goal here is to produce something 'unbiased' I thought).
Perhaps develop it in English, with input from those from non-English speaking countries on your working group, and then have it translated into multiple languages (also: be careful how you prioritize these, but if you have, say, a member from India on your
working group, perhaps Hindi becomes one of the first).