How to get better at low level Rust?

Hey!

I am a developer who mainly focuses on web development, and I've been trying out different kinds of programming, such as trying to build an interpreter or work with PNG encoding, both projects that I failed to have any progress in.

Whenever I work with that kind of stuff, or for example things that require a lot of working with bytes, binaries and whatever, I get really confused and fail to do anything.

How can I get better at this stuff? Are there any useful articles or books that help?

I know the Rust basics, I've read the book for that.

Also, I did try the pngme book that is supposed to help with that, but I instantly got stuck and left it out of frustration.

The same thing happened when I tried to make a simlle programming language with the chumsky library and read everything in the guide, just to realise that I haven't understood anything.

Thanks!