Designing the logo, picking a name for the startup, printing business cards, getting the website operating, starting the project, listening to critics, setting up meetings is the easy part.
The hard part is assembling the tribe; building their trust and earning their attention. The hard part is exerting emotional labor. The hard part is committing to finish the project once you hit the dip. The hard part is working on the project day after day.
The hard part is expensive if you wait until the end (overtime, overnight shipping, fixing shortcuts, missing the ship date).
Do the hard part first.