A keyboard guide could make common tasks easier to discover without asking users to memorize a long shortcut list. It might cover opening search, moving between report sections, navigating a table, and returning from a detail view. The guide should be reachable from a visible help control.
Any shortcuts need to respect text entry and assistive technology, and core actions should remain available through standard controls. Which tasks would you include first? I would measure success by whether keyboard users can complete a few routine workflows with fewer unnecessary steps.