Phone screening with amazon for L7 - In Ad revenue

Hi All This is my first interaction with Amazon - I have had initial HR screening she asked me to apply for L7, 16 YOE. I have started preparing my self for Leadership principles and system design I Have done occasionally in my current role based on the production issue Can someone please guide me on following 1. Can I buy some time to apply and schedule the interview 2. Any pointers how should I prepare? Appreciate your response current TC - 125K #tech #amazonphonescreen #amazoninterview