Hemp oil soaps are generally marketed for normal to sensitive skin. Some product listings explicitly recommend them for sensitive skin while others target normal skin types. If you have specific concerns (eczema, very dry or allergy-prone skin), check the product label or ingredients and patch-test before regular use.
Many hemp oil liquid soaps are formulated to be concentrated—some listings even state claims like "3x more concentrated"—and reviewers commonly report that a small amount goes a long way. Actual longevity will depend on how much you use per pump and frequency of use, so a little usually suffices.