In which fields or types of tasks would you like to develop and work most actively?

In the field of C/C++, you can actively develop in several directions:

• System programming: developing drivers, operating systems, embedded systems.
• Development of high-performance applications: games, graphics engines, financial systems.
• Working with low-level hardware and code optimization.
• Development of libraries and frameworks used in other languages.
• Embedded systems and IoT, where efficiency and resource control are important.

The choice depends on interests: if you like close-to-hardware and optimization — system programming and embedded systems. If you're interested in creating complex applications — games and graphics.