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The mountain names may be familiar, but the skiing needs a more precise choice. Grindelwald-Wengen, Grindelwald-First and Mürren-Schilthorn are distinct sectors. Pick your starting area for the runs your group can actually ski, then check which lifts and connections are open on your date.
A ski pass is different from a sightseeing Jungfrau Travel Pass, and an ordinary pass does not include a lesson. Beginners should arrange an appropriate teaching area and instruction rather than follow an ambitious route between resorts. Snow and weather decide opening; published winter tickets do not mean the pistes are already operating.