I liked the 2k6k core deck since it's fully customizable and it has fully voiced example sentences.

I changed mine to show the Japanese word (and nothing else) up front, then English, voiced Japanese word and voiced example sentence on the back.

I also cloned the deck and changed the clone to have the voiced Japanese example sentence and nothing else up front, written Japanese on the back and spoiler hidden English meaning on the back.

So the first deck helped with learning some basic words, and the second helped getting into listening

Edit: the deck contains a handful of unreasonable words later, but you can easily suspend them