Hmmm, I love OSM, consume their data in my small cycling project and regularly contribute smaller fixes.
But I also shy away from anything more complex than fixing attributes and meta data of existing objects. Especially editing relations, ways and nodes - is this possible with MapComplete? I loaded the Cyclofix map, but I can't even select cycle paths or roads, just edit POIs.
Checkout https://mapcomplete.org/cycle_infra and https://mapcomplete.org/cyclenodes.html
Editing attributes of relations is possible. Adding or deleting objects to relations might become possible one day. Editing geometries is out of scope for this project.