No, CAPTCHAs can and will be bypassed.
But you can make it expensive for bot hosters using PoW CAPTCHAs instead of normal ones. It's also better privacy-wise.
You need to think of things you might want to build. Try building software that nobody ever has, try fixing issues in current software using git. You can find lots of python program in GitHub, waiting for contributions.
That's how I learnt. If you want to learn and use C++, try building software that interacts with the real world with Arduino, try contributing to the Linux kernel or try making simple games using C++ in Godot.
That is why you don't use such operating systems in criticial systems.