I recommend starting with StreetComplete. It's a lot of fun.
For desktop, start with the standard ID editor which is user friendly.
Unofficial Canadian OpenStreetMap community.
Feel free to talk about:
Apps:
Organic Maps: Client app on Android & iOS
StreetComplete: Surveyor app where you can complete quests
Related Communities
OpenStreetMap is a map of the world, created by people like you and free to use under an open license.
Join OpenStreetMap and start mapping: openstreetmap.org
I recommend starting with StreetComplete. It's a lot of fun.
For desktop, start with the standard ID editor which is user friendly.