I am a beginner and I’m looking to create an API for a model that can answer questions based on proprietary materials, like my own notes or books. My aim is for the model to be able to provide answers directly from these sources. Could you please guide me on the right approach and the most suitable machine learning techniques for this? Additionally, I would appreciate recommendations on the best hosting platforms for the API, dataset storage, and deployment, along with an understanding of the associated costs.