I can't read your README since it's all in Russian but for starters you could add Cython to your python project, write your python files in that syntax and then compile them down into a C++ library, with a simple entry point, something like a main() function. Then dynamically load it from a small, simple, C++ program.
I am very bad at working with C ++
I can't even imagine where to start.
Well for starters, numpy is written using Cython and only uses a really basic amount of C language. So you can start by reading Cython's tutorials:
https://cython.readthedocs.io/en/latest/src/tutorial/index.html.
But if you don't know much C++ then if you wanna port programs to it you're going to have to at least learn C, the subset of C++. Raw C is slightly faster than using C++'s std library anyway and only has a few syntax/library functions you need to learn, the higher-level functions you might need can be swiped from Github and Stack Overflow.