Hi KuboF

Re: "how much involvement" - As you note, this would have to vary/scale depending on the community. Essentially, this means a few editors are willing to spend some time each week with tasks such as: testing out new features, discussing potential-improvements or bugs with those features, discussing/explaining/reading any related topics with the rest of their local language community, helping to improve the central documentation, and of course contributing content to Lexemes and Wikifunctions. The intensity of these tasks would vary over time, depending on where the projects are in their development cycle. A main task would be the communication with the wider community in the given language - and it is hard to predict how much time that would take.
CX was started way back in 2014, so that is complicated to compare it to, but based on my fuzzy memory that is probably a good comparison.

Also, thank you for creating an application for Esperanto already![1]

Best,
Quiddity/Nick

[1] https://www.wikidata.org/wiki/Wikidata:Lexicographical_data/Focus_languages/Form/Esperanto