If you want to set up a restrictive license you can use one of the Creative Commons licenses.
They vary from “very permissive” similar to MIT to “most restrictive” like. “You are allowed to re-distribute it, but don’t touch it!”
The Creative Commons project has a license builder with an easy to use interface.
They go from CC-BY to CC-BY-NC-ND see. About CC Licenses - Creative Commons
So there is absolutely no problem to start a project with CC-BY-NC-ND, where others are basically only allowed to read your content.
Later in the process you can at any time change your license to a less restrictive one.
That’s simple
BUT the other way around is hard. If you start a project with CC-BY or MIT or BSD it’s hard to make it more restrictive afterwards. … Because users can use and stay with our open license and develop it on their own.
So going from “open” to “restrictive” is hard. The other way around is simple.
@boris mentioned some new licenses in his talk: Open Source Licensing Evolution at Diffusion 2019 – Fission
eg:
The story there also shows, that it is hard to go from open to restrictive.