I Wan't to Learn Pentesting, and Planning to Learn Both C++ and Python. But I'm Not Sure About What I Should Start With?

I want to be able to:

• Develop malwares and exploits
• Develop pentesting tools

As far as I know, Python is better for develop pentesting tools, while on the other hand C++ is better for malwares and exploits. Fix me if I'm wrong.

So, what should I start with?