Start with your current spreadsheet problem
If formulas, formatting, references and basic charts are still unfamiliar, start with the beginner course. If those are already comfortable and the real need is broader data management, the longer Excel 365 course is the stronger fit.
Microsoft Excel Training for Beginners
The current course page lists a 4–5 hour beginner format covering the interface, formatting, common functions, cross-sheet references, formula errors and basic charts.
Microsoft Excel 365: From Beginner to Pro
The current course page lists a longer 6–10 hour advanced path with areas such as Get & Transform, filtering and sorting, document output and broader data management.
When Power BI is the better next step
If your real goal is interactive reporting rather than spreadsheet mastery, a Power BI introduction may be more relevant than taking another overlapping Excel course.
Bottom line
Use Excel training to solve a visible workbook problem. Once spreadsheet fundamentals stop being the bottleneck, move to analytics, automation or BI rather than repeating beginner content.