It is recommended to study these courses first:

  1. Veda chanting, a comprehensive initiation
  2. Invocatory prayers
  3. Mantras for health & well-being

The Sūktams & Gaṇapati Upaniṣat courses can be studied in any order. However, I recommend learning the Devī Sūktam & Puruṣa Sūktam after you have learnt at least 2 other Sūktams.