One certainly chante Nalayira Divya Prabandham. Learn it from someone else as a santhai. Our GSPK imparts Divya Prabandham in two sessions. For further information, join the Telegram group by clicking the link below.
https://t.me/gspkstotras.
Bhagavad Ramanuja’s Vedanta Sangraham is not only for beginners. It also includes difficult subjects and is suitable for everyone. To properly learn Sri Bhashyam, one must do so through a kalakshepam from an Acharya. Before doing so, fundamentally one must know Sanskrit and must have read Vyakarana-s, Kavya-s, etc. after which one can learn Sri Bhashyam from an Acharya.
Several Grantham-s are available on Srivaishnavism. Vedanta Desikan has graced us with Srivaishnava Nerigal. It contains many details about Srivaishnavam. This book is available in many places. Adhikarana Saravali is a summary of Bhagavad Ramanuja’s Sri Bhashyam and Vedanta Shastra and is in the form of shloka-s. It cannot be learned by oneself by reading through it instead, it must be learned through kalakshepam.