Prepare for Google L4

I'm currently working as an L59 with MS and am about to be promoted in this cycle to L60 with a total experience of 2 yrs Asking for suggestions as to how i can prepare for google L4 interviews and any roadmaps that can help in the preparation. I've about 3-6 months to prepare. Requesting googlers as to what will be the best strategy to prepare for the same. Thanks in advance.