That's a question with multiple answers.
In way, there is no *direct* living tradition, never really was (unless we count things like Yule and Halloween), but traditions grew naturally, because paganism is nature worship.
For example, there aren't any real prayers to say, because your actions are basically the prayer themselves.
(And this was probably a reason why Christianity managed to get a foothold, the claim of "marrying" already virtuous actions with "christian faith" to get into "heaven". )
But yeah, since paganism is polytheistic with no single perfect god, the gods are basically aspects of life.
If you strive to become stronger you are honoring Thor, god of strength and war.
If you strive to become wiser and to learn as much about the world as you can, you honor Odin
(he sacrificed his eye to drink from a spring of wisdom, and ultimately himself to reveal the runes to us)
If you strive to become just and fair, you honor Tyr, god of justice.
(By the way, those "human sacrifices" you may have heard about were capital punishments in his name, not too different from getting the chair or an injection nowadays)
If you strive to make the world a more beautiful place, strive to become radiant and elevated, you honor Freya, goddess of beauty and the hunt and all that good stuff
(Baldur also falls under that, her son)
So yeah, you don't have to pray or anything, but your purpose, even if you don't actively follow it, is to become part of the supersoldier army of the gods
Everything you do to better yourself honors the gods, and strengthens yourself along with it.
Take a look at christmas, or, what it really is, Yule.
Why is there a pine tree? Why does the pine tree have a star up top? Sometimes
even 5 pointed?
Because that's (supposed to be) a pentagram. And the tree doesn't just
represent the power of life even persevering in the darkest night (winter
solstice, evergreen plant) but also us, ourselves.
The first humans were trees into which Odin breathed life.
Therefore the tree with the star up top represents our duty to strive for
enlightenment (of which the pentagram is a symbol of. Obviously the Christians
don't like that one. at all.)
And things like that.
But we also have traditions. Like Yule, Halloween (children dress up like the
dead to enter the realm of the dead and meet their ancestors, perhaps even
"becoming them", a reason why we named our children after beloved family
members, like grandparents, so they may live on.)
And so forth.
But there is no direct "need" to do anything except trying to always improve
Traditions grow natually from that. It doesn't take much to stand in a forest,
breathe its life, perhaps even live close to the forest, and let your mind
wander if there are any spirits are in the trees, or observing natural
patterns (the wheel of the year is heavily harvest oriented, etc).
It's the nature (heh) of nature worship. So yeah. I get it, though. Many
people feel lost without dogma, and suddenly being "not hellbound" anymore, or
having to deal with all the other artificial problems Christianity offered
solutions for, while having created the problems in the first place.
There are things like codices, though. I'll post one as an example.
And while even this one is superior to the bland Christian one, it's still
just something that merely makes your life better. Not something you go to
hell for. Unless we are talking "hell on earth", because doing things opposite
to such guidelines usually results in a lowered quality of life.
Simply try to make the world more beautiful, yourself stronger and wiser, and
everything will fall into place.