Recently I've been dedicating time to improve my knowledge in mathematics. While I understand that this knowledge may not have immediate practical applications in everyday life, I believe it will be beneficial for enhancing my logical reasoning and problem-solving skills. Furthermore, it will be a first step to go deep into more advanced data structures and algorithms subjects.
My primary resource for this learning is the book "Concrete Mathematics: A Foundation for Computer Science"

I've begun studying about testing in general, because, although I do test in my projects, I consider my knowledge in this area to be shallow. My goal with this study is to enhance the quality of my tests and to learn to properly utilize every type of test, particularly unit, integration, and end-to-end (E2E) tests."
My primary resource for this learning is the book "JavaScript Assertivo: Testes e qualidade de código em todas as camadas da aplicação"