I only wish there was a FAQ for using OSM instead of Google Maps. From what I gather after reading many HN threads, OSM is the way to go, except they don't want to use the OSM page for daily navigation, you're supposed to find some provider of some of the mapping data, etc.
How do you want to use it? On your android phone you can just get an app like Maps.me, or OSMAnd.
https://www.openstreetmap.org/
Also, Mapbox has a powerful map styling UI that lets you choose exactly what map elements to display at a given zoom level:
https://www.mapbox.com/
We can basically build or contribute to alternatives that better suit our needs.