Churn/Attrition data of a company

I need a freelancer who specialises in data and research. I have data that I I have collated that needs :

A new structure of departments implemented

Graph of the turnover per quarter per year

Split Resignations vs Terminations % so we can see peaks for leavers for example there are more leavers in Aug 2021 vs 2022 because they're all graduates going back to university that's why numbers are high…. but what about peak leavers for May 2022 in the Sales team what is the reason?

Graph of leavers under 6 months, 6-12 months, a year and a year and a half. How long are we keeping people who are bad employees?

Length of service graph

This is the most important task: Find industry benchmarks we can compare against, in particular on Operations, Sales and Credit Decision as well as IT.