Why is the next meditation not suggested to me?

If you start a course as a whole, the next time you open the app the following unit will be suggested to you by the coach and you will see the future meditations in "My Journey" (in the main menu at the top right of the screen). If that is not the case you probably did not start a course by clicking on "Begin course".

For more details about completing a meditation see: Why is a meditation not counted?