Gumroad+zbrush+hand+details+vdm+brush+new ((full))
Once your macro (big forms) and meso (knuckles) are done, use the "Epidermal_Fine" VDM brushes. Unlike alphas that flatten out, these preserve the rolling hills of real skin.
Searching "ZBrush hand details VDM brush" on Gumroad returns several legacy packs, but the new release (typically by artists like Follygon, Keos Masons, or specialized human anatomy sculptors) contains features specifically updated for ZBrush 2024+ workflows. Here is what you typically get in a high-quality new release: gumroad+zbrush+hand+details+vdm+brush+new