Please read, make notes, and bring with you Sangharakshita’s The Ten Pillars of Buddhism. This is available as an e-book from Windhorse Publications (link below) or in printed form from various online book sellers.
This material is also available as a talk from Sangharakshita on Free Buddhist Audio - link below.
It will also be very helpful to look at Sangharakshita's Know Your Mind and Living Ethically.
Ethics 2 retreat:
Please read Know Your Mind Chapter 8 (Forces of Disintegration), Living Ethically Chapter 5 (The Ethics of Views) and Subhuti's paper Revering and Relying upon the Dharma (see link below).