Press the flag, and listen to what the girl/instructor is saying. After she is done talking, press the course button you want to enter. The only course open now is the first course and you can only learn one word, but I'll update it later. This only v.01, after all. :)
To Scratch, for the new features and blocks they added (like text to speech and translate) during the 3.0 update. YOU MIGHT NEED HEADPHONES TO LISTEN! (OR YOU CAN PLAY THE SOUND OUT LOUD)