Listen to the complete surah once without trying to keep up. Then listen again while following the Arabic.

Use the Quran player to slow the recitation and repeat an ayah. Notice that an-nas returns at the ends of ayahs 1, 2, 3, 5 and 6. Ayah 4 ends with al-khannas.

Practise outside prayer. Listening and repetition are learning tools, not a prescribed number of devotional repetitions.