The why is the first step to define your dream and ambitions before doing everything. But this first step has to be quickly followed by starting actions with small step implementation. I agree with Benjamin you will learn by doing. You will experiment and fail and then the how of your dream will be regularly reshaped. Patience and persistence will help to develop a Prouve Of Concept that will help to get supporters and funds. People need to touch your dreams in order to help you.

Then the second step is imagine how to deploy our dream. It is where the Minimal Viable Product concept is definitely a must-do to evaluate your potential business models. In some case, they need at least 8 years to find it.

Achieve our dream is always a long trip.