I have 20 years of working at a high level with Microsoft Excel, I love doing this kind of thing and problem solving, in my working life I have used Excel to produce solutions for companies in all kinds of fields and all kinds of situations.
The kind of thing I can do for you include:
Formula and calculations
Data cleansing
Lookups and data mapping
Report and dashboard building
Layout design
Forms
Stock management systems
Complex business process tools
Automation and templates
Security and cell protection
and much more