Help choosing which polytheism to pursue

[hraefngar]

Recently my wife bought we a valknut without knowing the meaning behind it, it tried it on. I've read some places that once it has been worn you have made a commitment to odin.

 
Just putting it on is not a commitment.

That being said, I honestly wouldn't wear it without a commitment. It's a symbol of sacrifice and binding, you see.  While others may disagree with me, I don't think it is meant to be worn casually as a symbol of Asatru.  

A Mjollnir is a lot better as a casual symbol.