I don't feel that any of the words you found quite capture the sense of information that you want (an 'information page'). For some of them, the information is more like evidence, or an accusation. Others are the 'information' given by an augur reading the omens. Still others are simply the information contained in an announcement. None of them capture the sense of information as description and explanation.
However, perhaps the following could help:
expositio - a statement, description; a definition
explicatio - an explanation; a description, account
You could combine the best of both worlds and have these as subheadings on your welcome page/pagina salutatoria (if you choose to use Joonas Ilmavirta's excellent answer).