I will give it a shot today.
Why does F-Droid tell me that the app has features that I may not like?
Non-Free Network Services
This Anti-Feature is applied to apps that promote or depend entirely on a Non-Free network service, or any service which is impossible, or not easy to replace. Replacement requires changes to the app or service. This antifeature would not apply, if there is a simple configuration option that allows pointing the app to a running instance of an alternative, publicly available, self-hostable, free software server solution.
Because you can't change it from using OpenStreetMap.org to an alternative self hosted site.
This is a cool idea! I contribute little by little when I can but this app looks like it makes it more convenient to do so.

This is the most fun app in the world. I hope they keep building on top of this, it's amazing! Plus, being able to see new "quests" popup as you edit on OSM/edit? Amazing!!
OpenStreetMap community
Everything #OpenStreetMap related is welcome: software releases, showing of your work, questions about how to tag something, as long as it has to do with OpenStreetMap or OpenStreetMap-related software.
OpenStreetMap is a map of the world, created by people like you and free to use under an open license.
Join OpenStreetMap and start mapping: https://www.openstreetmap.org/.
There are many communication channels about OSM, many organized around a certain country or region. Discover them on https://openstreetmap.community/
https://mapcomplete.org/ is an easy-to-use website to view, edit and add points (such as shops, restaurants and others)
https://learnosm.org/en/ has a lot of information for beginners too.