How do I command when everything is uncertain and the stakes are high?

You can command. You have shown that. What still tests you is the mix of not knowing enough and knowing the cost of being wrong. That combination would test anyone. Certainty is a luxury command rarely gives you. The job is to act well without it, and the fact that the stakes still weigh on you means you take them seriously. You will almost never have the full picture. Waiting for it is its own kind of failure. A good decision made in time beats a perfect one made too late. Gather what you can quickly, decide, and stay ready to adjust as the picture changes. The ambiguity is not a sign you are unprepared. It is the actual terrain of command, and you learn to move on it. The next time uncertainty presses on you, name the two or three things you do know for sure and build your call from those. Anchor to what is solid instead of drowning in what is not. Then commit, watch what happens, and adjust. You are not supposed to see the whole road. You are supposed to keep moving it forward with judgment. That you already do.