This is what I don't get. Aren't Daedra supposed to be the opposite of Aedra? I thought they were just as powerful, only represented chaos, change and destruction rather than creation. You'll have to excuse me, I have much to learn on the lore but it's really confusing.
Edit: Also, I thought Daedra Princes and Aedra were gods whereas Alduin was just a poser and not a true god.
Not as such.
In the beginning there were Anu and Padomay.
From them came the first Et'Ada, Lorkhan and Akatosh (Auri-El)
These represent time and space and got the ball rolling so to speak, and soon there were more Et'Ada.
Aedra, Daedra and Magna-Ge are all Et'Ada.
The difference is that Aedra gave (parts of) themselves in making creation, the Magna-Ge retreated to Aetherius and the Daedra are the ones that did not participate at all, but like to hang around and meddle.
When it comes to raw power, or being closest to what they originally were, those are the Daedra. Though they have limited power in the Mundus (creation).
Aedra are dead, insofar gods can be dead. They gave themselves into the Mundus.
Some became the Earthbones, the laws of nature, and some split into smaller parts and became the Ehlnofey, the first inhabitants of Tamriel.
Ehlnofey themselves had a tendency to split into smaller parts and became Aldmer, proto-Nedes, Khajiit, giants etc.
It is my understanding that the dragons in Skyrim are original Ehlnofey.
They came from the Aedra (Akatosh), but they do not reproduce or die so wouldnt be prone to become smaller, more numerous and less divine.