One of the keys to learning any skill (including language) is mastering it in its ‘small but complete’ form.
There are endless examples of this, here are a few:
If you can paint a single perfect flower, you can likely paint anything perfectly (not necessarily, but if you can’t paint a perfect flower then it’s unlikely that you can paint everything else perfectly).
If you can do the basic steps of a dance, you are on your way to dancing well.
If you know a single verb, just in first person, in past, present, and future, in the language you’re learning, that’s a microcosm of the grammatical system of the language.
The key is recognizing the microcosm – seeing the ‘whole picture’ in its small (not simple, which implies details are scrubbed) but complete form, mastering those basic steps, and allowing them to bloom.