There is a reason why Bob Iger identifies optimism as the #1 behavior a leader must have.
"If you walk up and down the hall constantly telling people ‘The sky is falling,’ a sense of doom and gloom will, over time, permeate the company. You can’t communicate pessimism to the people around you. It’s ruinous to morale."
Remember that everything you do as a leader will be incredibly magnified or diffused as it works its way through the organization, your customers, your trade partners, and your community.
When there are no clear answers, it is critical to experiment, learn and rapidly scale up those things that work. Plan >> Do >> Check >> Adjust.