Applied at Google for Product Manager Level 4

I am preparing for a PM interview at Google for a Level 4 position, and I have my hiring manager round scheduled for Tuesday, July 28. I am reaching out to see if there are any experienced PMs at Google who could provide guidance or mentorship before my interview. I've been unemployed for the past eight months following a layoff, and I have been struggling to secure job offers. Any advice, frameworks, or resources you could share would be immensely helpful to me during this crucial time.