As a long time backend and full stack developer my brain is stucked in web services. Which works Well as employee but when it comes to have your own product you are playing against Google,AWS,meta and so on.
Maybe I try developing desktop applications too.
And here: https://notes.alinpanaitiu.com/
The most desktop app technical + marketing related article would be: https://alinpanaitiu.com/blog/apps-outside-app-store/
I worked as a web dev for 5 years first, and those skills transferred well into the marketing and API part of the apps.
For example my Lunar app even has a CLI that is implemented as client-server and the app also provides an API for controlling displays remotely or through a Raspberry Pi server. That would have been very hard had I not known how to write an API.