Go back to the source: the dvergr of Svartalfheim in Norse mythology. They live underground, and they're good with tools. That's all these dwarfs have in common with D&D dwarves.
Dvergr are intensely magical - they created Thor's hammer Mjölnir, Odin's spear Gungnir, Freyr's ship Skķšblašnir, and many other artifacts of immense magical power.
Four dvergr have lent their names to the cardinal directions of the compass: Austri, Vestri, Noršri, and Sušri (“East,” “West,” “North,” and “South”) hold the sky off the ground. This is an example of both their strength and their height - dvergr are not short.
Their skin is pitch black. They might or might not have beards. And their accent is Norse, not Scottish.
More at
https://norse-mythology.org/gods-and-creatures/dwarves/ , from which I cribbed most of the above.