Oh dear.
Using JOSM for your 1st edit is definitely not recommended.
Doing the same with iD (the editor embedded in the OSM website) is faster and there's even a tutorial that will explain a bit about how things work.
I appreciate this a lot, but I wonder why the first edit is not done on the website itself. This is 15 minutes of work for a single change, while on the website you can do it in a minute.
JOSM is great when you get really into, but if it's really your first edit, just use the editor on openstreetmap.org.
If it's something you end up enjoying, one really satisfying thing to do is pick a small rural town and improve the map. With a few hours, it's not hard to make the OSM data more detailed and better than any other publicly available map.
Boy, the UX is horrible!
> The area you tried to downlaod is too big or your request was too large.
And no indication whatsoever of how big the area should be, I'm at my fifth attempt so far.
It's actually OK compared to your typical GIS desktop app, but naturally not the thing to recommend a beginner.
Sorry you're having such a frustrating first experience. I'd recommend trying just 1-3 city blocks max
Funny enough, Cafe Lolo, the business that the example edit demonstrates, replaced my favorite restaurant in Seattle, Cookweaver. The chef-owner of Cookweaver is now doing private events and in-home meals for folks who miss his cooking: https://www.cookweaver.com/omakase-menu
> Do NOT use search results for social media profiles
This seems a bit outdated as many restaurants/shops now consider they FB/insta page as their "official" website (or rather lack of).
For social media profiles, a different tag like contact:facebook, contact:instagram, etc. are recommended!
[1] https://taginfo.openstreetmap.org/keys/contact:facebook [2] https://taginfo.openstreetmap.org/keys/contact:instagram
There's separate tags for the social media profiles. So those can still be added.
I would honestly not recommend beginners use JOSM - the web based iD editor [1] is much easier to learn and will hold your hand a lot more.