How can I start preparing for IAS or PCS doing B.Sc in non-medical 1-year in regular classes full-time at a college?

Civil Services Preparation must start when you are in graduation or even in the senior secondary. You have thought of it at the right time. Regarding PCS as well the same preparation is beneficial. 1. Excellent General Awareness 2. Composition / Writing Skills 3. Vocabulary English and Reading 4.