Many beginner decks come not just with kanji, but also furigana (tiny hiragana over the kanji). In that case, the manual has some information: https://docs.ankiweb.net/templates/fields.html#ruby-characters
There are also multiple add-ons that are meant to help you with generating the furigana.
Anki's user manual. Anki is a flashcard program that makes learning easier.