Classmate - A Unique Study Partner App

I want to build a study partner app - Classmate. here is the details. What Classmate is
Classmate is a direct-to-consumer (B2C) product built for students only — parents subscribe on behalf of their children, rather than schools buying seats. There's no school-administrator role; the platform's own admin/content team manages curriculum content, onboarding, and support. At its core is a retrieval-augmented generation (RAG) pipeline: the admin/content team ingests e-books, the system parses and chunks them, chunks are embedded into a vector store, and student questions are answered only from those chunks with a citation (e.g. "chapter 6, page 82"). Questions the system can't confidently answer are logged as content gaps and surfaced to the admin console; borderline or unsafe conversations are queued there for human moderation, with parents notified where relevant.