Excel File Enhancement

I need an Excel expert to improve an existing Excel file. The project involves:

- Data accuracy and validation
- formulas review
- Formatting and layout
- Refining formulas and functions

Specific requirements include:

- Data Validation: Implement error messages for incorrect data and automatic data correction.
- Formatting Improvements: Ensure consistent cell styles and colors, improve readability with better fonts and alignment, and enhance charts and visual elements.

Ideal Skills and Experience:
- Advanced Excel proficiency
- Strong attention to detail
- Experience in data validation and error handling
- Good design sense for improved readability and aesthetics

Please share your relevant experience and approach.