I ran "homelabs" on a pi2 before, just be aware of your limits (cbf to wait) and the HW limits. You generally don't need a gui either if you just ssh/run a webpage so that's also less load.
Which is funny because both artists of 'Death Note' also made 'Bakuman', a manga about mangaka that are trying to become big, so you got a lot of that "We need X votes in the survey to not get canned, readers like Y" stuff in there.
the rss feed should include different entries for each version, rss managers generally mark already downloaded entries as downloaded, but you can also mark entries as already downloaded manually so you don't download stuff you already downloaded before.
Neither isos nor anime is big on deltas like that so it's generally the entire thing every time. With anime you have the advantage that subs can be seperated so if an episode requires a v2 (a sub with fixes) which some sub groups actually do (or some random does it for them, it depends) they can just throw out a subfile which you just put into your video player or w/e, but it's rare nowadays.
Regardless, RSS feeds are generally not a good tool for deltas anyway because you might just decide to skip a release anyway.
And you can throw those RSS feeds into qbittorrent/rtorrent for example. There are also multiple release groups that ultimately just rip from the official source but might do extra things like clean up the typesetting/fix subs/encode into h265/av1. Some aren't even on nyaa but only on https://animetosho.org/. If you got a box laying around you can throw sonarr at it and then filter through there. Hf.
RT got banned in EU post invasion as did all the TV stations. If you care enough you can still watch it via some stream. 99% don't know what a yandex/VK is which is why they don't bother, but they have heard of telegram so there is policing there.
It also goes both ways where (some) Russians are afraid of the gov spying of them cause they could go to jail, but also don't trust the US, so instead of using secure Whatsapp which has E2E encryption enabled, they use telegram instead because it's Russian, even though majority of the time it's not encrypted.