Greetings; I am interested in RPing a Worgen Druid when cataclysm comes; but I have a few questions:

Firstly, are they druids of the scythe who can't just turn back into Night elves but can turn into to humans or are they humans/worgen that learned druidism from said druids, or are they just humans who figured out a way to shapeshift to a bear or a cat, since they can shape shift into a Worgen?

Secondly, could a worgen hermit self teach himself to be a druid

Thanks

There is a deep link between Night Elves and the Worgen, as the Worgen are a part of the Night Elf mytholgy.

Instead of reciting it all here though (partially because I cannot remember all the Worgen lore by heart), I will instead like to direct your attention to this excellent article about the druidic Worgen on WoWWiki :-)
http://www.wowwiki.com/Worgen_%28playable%29

Perhaps this can help you in your preparations for playing a Worgen Druid :-)