I clicked this expecting some deep-dive ramble about moving all communications to Matrix, but this is actually a very concise and accessible guide. Now, I will admit I'm biased since I already follow all of these steps, but it seems really simple to me. In fact, the addition of the "Expected effort" bits makes me wonder if I could convince some friends to follow suit and at least switch to Firefox and DDG. OSM has proven a hard sell so far, sadly.
Regarding usage of OpenStreetMap over Google Maps - assuming we're talking mobile usage - you might give OSMAnd[0] a try. I've been using it exclusively on a Pixel loaded with GrapheneOS for a few months now. I would never consider going back to GMaps and I don't feel that I've lost anything either.
I have not had Google Maps on my phone for a couple of years now, but I still think that GMaps is superior. Locations are more maintained, address geocoding is near perfect, it has plentiful useful reviews, and live traffic updates.
As far as location maintenance, this is obviously correlated with usage, and so I hope this will improve over time.
