C++ sounds like... fun? For various definitions of 'fun'. At least you'll have a compiler chain that can target the OS/HW combo you're running.
Do you have a blog or something that you post updates on?
Golang to me is a lot easier to learn than Rust and I had fancied it before. Although it's one of those things if you don't use it often... lose it. C++ I use it some for my hobby robotics projects and most recently I was working with ESP-IDF/bluetooth stack and that was all C/C++. I am more of a scripted language person eg. JavaScript/Python are my main languages.
For the old computer talk above this is the project, can see I did make an agent client (although a poor one) using Tkinter since the ASUS 1005HA was able to compile the python wheels (although it took a few hours).
I'm also going to use a local LLM I have a 4070 so I can run like Llama-3-8B through llama.cpp