Just my collection of helpful links (hopefully growing in the future). Might also be useful for your software development endeavours.

C++

C++ Reddit
https://www.reddit.com/r/cpp/

C++ Reference
https://en.cppreference.com/w/

C++ Weekly
https://www.youtube.com/playlist?list=PLs3KjaCtOwSZ2tbuV1hx8Xz-rFZTan2J1

CppCast
https://cppcast.com

Compiler Explorer
https://godbolt.org

Rust

Rust Reddit
https://www.reddit.com/r/rust/

Take Your First Steps with Rust
https://docs.microsoft.com/en-us/learn/paths/rust-first-steps/

Tour of Rust
https://tourofrust.com

Python

Automate the Boring Stuff with Python
https://automatetheboringstuff.com