There's this obsession to break knowledge into facts and rules. We're fascinated with getting down to its building blocks.
That has its place, I'll admit.
But to learn a language, certainly if you want to use it, deal with intact text.
Songs. Poems. Stories. Articles. Books. Movies. Comics.
And so a word is better than a bunch of letters. Words in groups as phrases or sentences include a sense of how they are put together. Paragraphs develop a sentence. And an entire chapter, story or book enable you to get into the language in the realest sense of all.