In Exodus, Moses get's frustrated with God. Well, less with God directly, and more focused on the unknowns. Moses wants to know it all. He wants to have a clear path to the Promised Land without the lingering doubt that sits with any plan.
When he talks to God, his discussion is very similar to prayers I've prayed over the years. Let me give you an example of one of my prayers:
"God? I've been taking this path for years now. I feel like I'm going to right way. I feel this is helping others, but couldn't you just speak it to me and then I'll know, know? Can't I just see 5-10 years in the future and then I won't have this fear?"
The future, no matter how planned or thought out, will always be filled with unknowns, even for Moses. God is everything, and even Moses could only see a piece of everything: ie, God's back. There has been no journey, and there never will be a journey, where we know all the answers going into it.
If we refuse to move forward because we're waiting for all our questions to be answered, all we're doing is stalling. All your questions won't be answered. That's part of the deal. The future would be very boring if we saw the cliff notes before we journeyed on. For Moses they were lucky to know their "now" was impossible. It's one of the reasons the Israelites couldn't stay in Egypt. At least in Egypt they had a home. At least in Egypt they had the illusion of security. The wilderness is nothing, and that's why we're called to it first. We must be unsettled in our now, to successfully seek our future.
We can't know it all. We can let go and seek something better. Will it end well? Well, there are really selfish people in this world who are spiteful to the point of hurting goodness, so I can't promise you perfection. No one can. I can promise you, stagnation never has a good ending. Ever. If that's where we're at, you have to make your choice. Fester, or attempt something radically new. If you want me to tell you exactly what that will look like, sorry. God didn't even give Moses the entire picture. I just know I'm not staying in the wilderness.