What is the primary purpose and structure of the first chapter of Shri Sai Satcharitra?

Chapter 1 of the Sai Satcharitra, titled 'Mangalacharan', serves as a series of auspicious invocations to ensure the successful and obstacle-free completion of the book. As detailed in this chapter, the author follows the traditional practice of offering salutations to deities at the start of any significant task. The text mentions specific prayers to Lord Ganesha, the destroyer of obstacles, and Goddess Saraswati, the goddess of speech and knowledge. The ultimate purpose of this auspicious beginning, as stated in Chapter 1, is the removal of all impediments and the fulfillment of the desired goal, which is to narrate the life of Sai Baba.