Welcome!
No, we do not do any curation. You can curate the feed yourself by subscribing to communities you're interested in, and changing the front page from "All" to "Subscribed" (you can make Subscribed your default view in your settings: https://lemmy.one/settings)
Yes
https://join-lemmy.org/instances is the only list I'm aware of.
The requirements are not high, although I'm not sure whether ARM is officially supported, so YMMV with an Orange Pi 5.
No
Lemmy doesn't let you follow individual users unfortunately.
You can't interact via the Lemmy interface without an account on a Lemmy instance. Mastodon lets you follow Lemmy communities, upvote posts (via likes), and reply to Lemmy posts like you did here, but all that only happens through Mastodon if you use a Mastodon account.
This is why for people who use Lemmy regularly it probably makes more sense to register somewhere like kbin.social or lemmy.one, but interacting via Mastodon like this is nice if you just want to leave a quick comment every once in a while without needing yet another account.
How/which URL should we link to then?
My (somewhat) hot take is that large migrating subreddits should probably host their own communities, which is what we did when we told people on r/PrivacyGuides to move to Lemmy. Or at the very least, actually coordinate with instance admins beforehand about all of this, clearly lemmy.ml isn't the ideal choice for this situation.
You can’t see them if nobody here has subscribed to them yet, but if you paste the URL for those communities in https://lemmy.one/search, they’ll show up.
There should be no problem joining their communities, just paste the URL for any of them into the box on https://lemmy.one/search
No we have nothing to do with r/privacy :)
Is there a program you have in mind which can do this automatic reposting? I’m not aware of a Lemmy feature which does this.
That should work too, but maybe you need an ! at the beginning, like [[email protected]](/c/[email protected])
Click the copy icon to the right of the community name on the search tool, then go to https://lemmy.one/search and paste in the URL it copied, and the community should show up. If it doesn't immediately show up: wait 30 seconds, refresh the search page, and try again, and then it will work.
My guess is that Reddit is alluding to the stupid suggestion of "just make your app more efficient with requests bro" (paraphrasing) that I saw an admin make. Reddit's already said they're not open to negotiations.
I do think that the Docker images are available for ARM, it’s just the automatic Ansible scripts which might not support it IIRC, so if you’re comfortable with messing with it a bit I think you can do it. Otherwise yeah a small VPS should also work fine.