What are you waiting for? Stupid question. „What are you waiting for?“ is such a saying for the big plan we should have. „What are you waiting for? Go for it!“
But I see it from another perspective: Could you already have what you really want and wait for?
Instead of waiting, you can go from doubting to doing. Test the smallest unit from the big idea. Teach a person if you want to build schools in Africa later. You don’t need big impulses for that, you just need some willpower. Then there will be nothing between wanting and doing, just a question:
What are you waiting for?