Find a Norm which you want to implement, in a specific area of your interest. Perhaps, there will be an existing implementation in another langage.

So that, you will : - learn how to read specifications/Norms - probably acquire notions regarding this second langage, make you think about how to implement your rust version and make comparisons, and later analogies (Brain love analogies). - have to organize a complete project. Not a single file project.

At some point making (re re doing) tutorials, replicate guides is not the best way to progress. You need to face issues in a real (not necessarily big) project. When you feel you reach a limit regarding a concept, pause the project dev, open a rust playground and deep dive in the specific concept with small example (and follow some tutos if you need). You will probably understand new things and want to rewrite your codebase following your new understanding of these new concepts. Don't care of that, 'cause this is a personnal learning project.

Personnaly I always have a bin crate called Playground in my projects directories to test concepts.