Links

These are some websites and resources that I can recommend.

Learning Japanese

WaniKani An excellent, well-made platform for learning kanji. Uses SRS.
Imabi Japanese grammar explained very thoroughly, with details that other resources often gloss over.

Rust

Rust Atomics and Locks Explains low-level concurrency in Rust, without assuming you already know the underlying primitives.
Learning Rust with Entirely Too Many Linked Lists A great resource for understanding unsafe and other complex topics in Rust.
Rust Design Patterns Really useful when building intuition for the 'Rusty' way to do things.