Where could I learn Visual Basics (VBA-Excel) to be an expert?

Question

I really need to improve my VBA skills therefore I need to know an online course, website, an app of something similar

Answer 1

http://www.excel-easy.com/vba.html
http://goalkicker.com/ExcelVBABook/
http://goalkicker.com/VBABook/
http://goalkicker.com/VisualBasic_NETBook/

Answer 2

https://msdn.microsoft.com/en-us/library/office/gg264383.aspx