Links
Links to some blogs that I enjoy:
Power Query
Easy to intermediate
Excel on Fire: Solve problems with Oz du Soleil at his Youtube channel. Entertaining!
Easy to advanced
ExcelGuru.ca: Mainly Power Query
Intermediate to advanced
CrossJoin: Microsoft Analysis Services, MDX, DAX, Power Pivot, Power Query And Power BI
Ivan Bonds Blog: Another good blog
The BI Accountant: Accountancy background but does everything
Ben Gribaudo: Some in-depth but clear articles on fundamental parts of power query
Excel & VBA
ExcelMacroMastery: General reference guide to VBA, straight forward, in depth & with diagrams
AnalystCave: Another great website, also has articles on topics not found elsewhere.
NewtonExcelBach: Excel, VBA, xlwings (Python) & Civil Engineering
QuantMacro: Finance, Statistics & Machine Learning with Excel, VBA and a bit of R
E90E50: Crazy charting with Excel