Excel Formula Tutoring

I need an Excel tutor to improve my skills, especially in formulas. I'm currently at an intermediate level. I'm open to learning through any method.

Ideal Skills:
- Proficiency in Excel, particularly in VLOOKUP/HLOOKUP, IF statements, and SUMIFS/COUNTIFS
- Experience in teaching or tutoring Excel
- Ability to customize lessons based on my learning preferences

Please provide a brief overview of your approach and relevant experience.