Nice start. A clear trunk with no obvious scars. Nice
Best trait of beech is its smooth bark, best if can be shown with few or no man made blemishes. Be careful to avoid wire scars, as they can ruin a beech.
I'd consider putting it back in the ground for a few years, but that is up to you. I have heavy clay soil that once a tree roots in, it is difficult to dig it out of the ground even 2 years after putting it in the ground. So grow box growing is how I size up most material. Grow box growing is slower than in ground.