As for keeping updated on the situation, I've been following the news in the Arch Linux discord and the Github page which had the AUR malware scanning script.
The general idea is to find a small set of programs, in a more supported set that serves your usecase. So you learn more about a smaller number of programs. Downside is that you are now able to rewrite your entire system in a single language.
https://www.phoronix.com/news/Arch-Linux-AUR-400-Compromised