Please make smaller query intervals for cards you don't know yet. Even if I have classified half of the flashcards as difficult, the query interval increases significantly.I think it's good that not every day the same flashcards and always only a few flashcards are queried. Nevertheless, the date for the next query should also take into account the cards that were not queried on this day and were previously classified as hard, otherwise they will be queried, for example only in two weeks, which affects the learning progress.