Google sheets data analysis

Description

I need a one off project completed. I own a small surveying company and I have a set of performance statistics I want to track over time. E.g. average time between being instructed and delivering the report, how this changes over time etc. I have the information in a Google sheet document or series of Google sheet documents. I would like graphs and a dashboard, I would like the formula done so that I have to do very little to update these graphs and performance metrics each month. I will carry out a video call with whomever seems most suitable prior to engaging in the services so that you fully understand my requirements and are able to carry out the tasks. I would imagine it should take a few hours or half a day perhaps for someone competent once I have given you all of the data and all of what I would like out of it.