I’m sure you won’t be disappointed. I’ve never needed to break in Hanwags and have even bought them on the way to the trail head because of this. That being said though I know everyone’s feet are different.
What I do, do for every new pair is peel back the top of the rand and re-glue it along with gluing the seams along the top and bottom of the rand all the way around using gear aid, aquaseal. Seems to be a decent enough glue and holds up to constant shale pretty well. After glueing, waterproof your boots as normal.