I missed something. Should I go back and repeat?

The audio course Ripeti con me! and the reading Leggi con me! are stand-alone sections. However, since their lessons are sorted by level, you can

Research proves that you learn better if you first rely on speech only. If you rely on text, your brain tries to process the letters

I picked most of the vocabulary from a list of the most frequently used 1,000 words in Italian. The grammar patterns are also very common,