Are you going to teach some “C++ Frameworks”?

Everybody is teaching the C++ Programming Language, but nobody teaches us how to create real-world C++ applications. So, I’ve found it necessary to ask you about how we can create GUI WEB, Android, IOS, Desktop and other applications with C++… Which C++ framework is the best for speed and security? Is there any framework to create cross-platform apps (including web) using C++? For example, if I use Oat++ to write web applications, will it be more secure than Python-Django?