You don't need to know HOW to do everything. Just get started.
The most important thing about entrepreneurship is to get started. And the second most important thing is to not quit.
So many people hold themselves back because they don't know how to get everything they think they need done. But the secret is you only have to know how to do what your next step is. Maybe there is 100 steps from where you are to where you are going: You do not need to know what step 97 is to be able to take step 1.