I was trying to self read "Electrodynamics by Griffiths". However, I find it very difficult when different coordinate systems were used simultaneously. Specially in Electrostatics and Magnetostatics. I found out that I do not understand the mathematical calculations because of the skipped steps. Furthermore, sudden transformation of coordinate systems added more complexity on top of that.
Specially the directions of 'E' and 'B' fields, their cross products, sudden change in coordinate systems with directions etc. Therefore, I am seeking your suggestions to ground up (a video lecture will be extremely helpful) my mathematical background so that I can master Electromagnetic Theories (specially various types of problem solving). I need it very badly because I am enrolled in a graduate school and without deep understanding of the basics I might fall in trouble.
Note: I have gone through the first chapter of the Griffiths book, however that doesn’t help.