hi,
it looks good, but:
normally all the shields in that time including Norse ones were covered by leather, and it was painted, which protected the wood and hided its structure, because a heavy axe strike could break it if hit in the direction of the boards.
moreover, I have never seen steel/iron edge on Norse shields, maybe I’m wrong, but as I remember it was rather applied on Roman shields.
this link might help you to be historically accurate (but there are many similar sites dealing with ancient/medieval weaponry): Hurstwic: Viking Shields