The digital product itself is the last thing to be thought about. The first thing is the process. The important work is re-engineering or creating your business processes so they are digital by default.
Staring with the design of the digital product first is like perfecting your choke in Jiu Jitsu but having terrible movement so there would be no way for you to get into the proper position for your well-practiced choke.
Just like you need to work on how to get into the proper position for a choke — you need to work on the proper process to be able to execute on a digital product. Just like there is no submission without position, there is no application without process.