Interview tips for Google L3

Hi all, I want to become L3 at Google California location before October. Starting preparation from this month. I want some tips on how to best prepare for it. I currently have only 5 months experience at amazon. Bored with Seattle and want to move to California. Please feel free to comment on what should be the approach from start to end. #leetcode #google #softwaredeveloper #GoogleCalifornia