Sorry, I should have worded that more carefully. I want to stay in C++, I feel that these 73 tutorials just skim the surface. If you were me and finished these 73 tutorials and wanted to conitnue in C++ what would you read/watch next?
Well, that depends. Actually, you could move on a new field(cryptography, web rogramming), or a new language (i.e. java, C# etc.) or keep advancing C++. If you're interested in GUI, I would advise learning Qt programming, or even GTK (and linux of course, you will need it some day, after all). I hope I've given you some useful pointers. Good luck. Take care ;)