For information about eju, please refer to:

http://www2.jasso.go.jp/eju/index.html

The scope and answer of the question are very clear and can be understood as introductory knowledge. If you don't understand, there is no need to join eju.

It's better to ask your language school teacher about your study and admission. Your school should have posted publicity materials. Besides, are there no seniors? Is this your first treatment?

The best way to buy books in a bookstore.