Anyone Played Skyrim (Elder Scrolls V) Yet?

[Ollie]

I finally married Aela the huntress. Another thing that happened to me is that while doing quest I ending up, accidentally joining the Thieve' s Guild. :/



I desperately need help in the main quests!!! *SPOILERS AHEAD*

Im on the quest "Alduin's Bane" and i'm currently finding it impossible to defeat (or you do whatever to him). Please help I have literally tried everything from using bows, to using swords and fire. Everything I do does no damage to hime!