Seeing is the not the same as doing.
You can watch a thousand entrepreneurs start and fail and thrive and make millions. You will learn nothing.
There is only one way to learn how to start a startup: Start a startup.
The magic tricks are what happens behind the scenes. Hiring staff, finding customers, managing cashflow, keeping calm.
These are not skills that can be learnt from books and watching.
They can only be learnt by doing.
Get busy doing, or get busy dying.