Personally, I never use a pre-made Anki deck. It feels like skipping over the initial learning period that I'm trying to lock-in with further study. Making every card I use myself means that I won't be totally baffled the first time it comes up, and there's a good reason I added it in the first place. Using a pre-made deck just feels like a barrage of random information like this: https://twitter.com/zbgolia/status/1…
The other thing that helps is if you first read the source from which the anki cards were made. In my case, it's a specific set of books/questions.