Ancient/extinct languages - resources?

So, let's say that i'd like to learn Sumerian and cuneiform writing. Any site that would teach me it? As well, there's a shortage of archeologists 'ere. The reason is quite universal: Why not?

Or something far more lively, Latin. As this language is still used today, are there any resources that could teach me, something as easy as, like, 'Teach yourself latin in one month'?
Paper books preferably.

Or any other oldass langauges that, although no longer in use, have their 'quick tour' resources?

And what do you think about that topic?

This Latin textbook is about as good as a language textbook can be:

http://www.lingua-latina.dk/index2.htm