Currently there’s only 3 big players when it comes to maps. You’ve got Google, Apple and Microsoft.
Let’s try to make OpenStreetMap the best map there is. Go grab StreetComplete and start mapping your surroundings when you’re out and about.
All the data is under a public license and managed by a non-profit foundation in the UK.
It’s very easy to get started, and quite addictive.
Just noting that while Organic Maps does allow a pretty good level of editing, it’s not a feature complete map editor. There are many others apps/sites that are purpose-built for editing if you need more functionality. i personally use Vespucci on Android.