Mine would be creating pen and paper ciphers for my made up secret communication needs.

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[โ€“] 2 points 3 years ago (1 child)

An easy way is to download StreetComplete an app that breaks down contributions into easy questions about things around you.

I got started by just diving in with the editor at OpenStreetMap.org (Green button top left) and building knowledge using the OSM wiki (which is overwhelming at first)

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