I'd challenge the notion (and do so a lot on this sub) that we really know so much about pre-Christian Norse religion. It didn't survive to be written down in the Eddas. Snorri wrote those around 1220, by which time Iceland had been 'officially' converted for 220 years and solidly so for about 150 of those. It's not likely he (or even anyone he met) had met an actual pagan. Nor was his purpose in writing the Eddas to preserve knowledge of the religion, but rather to preserve the literary tradition of skaldic poetry, a fact made explicit. The Poetic Edda is a compilation of such poetry, and the largest chapter of Snorri's own Prose Edda is Skáldskaparmál ('the language of skaldic poetry'). What Snorri writes about the gods is as raw material for composing more such poetry about them, which thus people (including Snorri himself) continued to do for a long time after conversion. This was not necessarily seen as being at odds with Christianity because (as Snorri also wrote), a good christian was not supposed to believe in these gods, and telling these stories did not imply that you did so. Also, in Snorri's view, the gods had really originated as humans of old, some with magical powers, whose reputations had gotten out of hand, basically. (a euhemerism)

This wasn't out of the ordinary for the time either, where the Matter of Troy (Trojan war stories, mainly adapted from the Aeneid) and the Matter of Rome (other stories of Roman and Greek mythology) were in fact quite popular with continental writers of Snorri's era. He may have been aiming to create a 'Matter of Scandinavia'.

In any case, even during the pre-Christian era, skaldic poetry was not scripture. It was entertainment, performed in royal courts and such functions. The relationship between the literary version of the gods and the gods being actually worshiped is pretty unclear, and there's a lot suggesting they were not the same. Also, that there was quite a lot of regional variation in religious practices and which gods were worshiped and how - and that's just in Scandinavia. (e.g. there are more place names indicating vi cult sites dedicated to the god Ullr in Sweden than there are for Odin or Thor, by a significant margin; yet this god only warrants passing mention in the Eddas) Some gods that were very significant in the Eddas stories have almost no references outside them (Loki, Heimdallr) and where they do turn up it's fairly late in history (9th century or later).

Certainly it's - at least partially - the same pantheon as in other Germanic areas. But there are also things showing differences. For instance the German Merseburg Charms, a rare bit of pre-Christian magic mentions Sinthgunt, an otherwise unknown god mentioned alongside figures that recur in the Eddas, such as Balder. There's no evidence the god Loki existed outside Scandinavia (and may not have been more than a literary figure even there), so that's a bit too bad for Wagner's Ring Cycle. (although the Sigurd/Siegfried legend really was common to Germany and Scandinavia. However it also turns up in popular depictions in Scandinavia well into the 13th century, indicating it was not necessarily seen as an unchristian story)

You could not practice Norse paganism on the basis of the Eddas. While they have the occasional mention of pagan practices like magic/seiðr and sacrifices/blót little if any practical detail is given. We don't know much from texts how a sacrifice was performed (Ibn Fadlan has the one eyewitness account), how one worshipped at a ví site, at sacrificial lakes/bogs, or at temples. Or for that matter how these things related to each other. We don't know what amulet rings were for, even though archaeology indicates they were an important part of the cult, with hundreds of them being deposited over many centuries at the largest ví sites excavated so far.

So anyway, the notion that we know a lot about Norse religion comes from the Eddas and their stories being very documented and cross-referenced, and people have added their own guesses and interpolations on top of them. (much as, say, a TV-show fan wiki might try to eke out every conceivable detail about the fictional universe from the slightest bits of dialogue) It all looks very detailed, and it's certainly a valid source on Scandinavian folklore. But as said, it's unclear what it means in terms of describing the actual cult. If it'd actually been a paganism how-to, though, it's unlikely it'd have ever survived.

Accepting that the Eddas are at best an unreliable guide to the popular cult, the image you're left with is mainly based off archaeology, as the contemporary written sources are few and far in-between. The image is confusing, fragmentary and full of guesswork and holes, and really not that much clearer than the records of pre-Christian religion in other Germanic areas.