When trying to reconstruct an old religion, like the old Norse one, it’s not necessary in our day and age to do everything my Norse ancestors did.
So, they practised sacrificing animals. So, what? This isn’t necessary today, to have a proper relationship with the Gods.
My ancestors practised human sacrifice, too, but no-one in their right mind would revive such a custom.
There are so many ways we can dedicate our time, attention and devotion to our Gods.
We can be creative: we can sing, dance, draw or paint, write stories or poems, or craft something for Them.
We can give of our time or money to worthy causes, in Their name.
It’s not important, IMO, to do exactly as the old Norse did. This is one of the reasons why I’m not a reconstructionist Heathen, but a devotional polytheist. I’m finding my own path with the Gods, and I don’t think it’s any less valid than the customs of my ancestors, just because it’s different.
What is important is to give the Gods gifts out of love, to give Them of our time and attention.