[routine help] [anti-aging] Using Differin with ZO products

Hi, I recently purchased Differin as my first time using a retinoid product for anti-aging. I use 3 ZO products: cleanser, clarifying pads and Daily Power Defense. 1. Should I apply Differin before or after Daily Power Defense? 2. Do I have to apply a moisturizer when using the Differin or is the DPD enough? I am 50+, no acne or major skin concerns ... just want some anti-aging help for fine lines. Thanks!