I finish the common core in about one year. The code is never perfect, but I learned a lot. I really liked all this basics like making a libft in C, thread, doing a terminal shell !!!, seeing sorting algorithm, seing network stuff, seing socket or RFC protocol, making a 3D game engine, learning docker and finally all around web : js, css, html, and a lot of frameworks.
But the most important thing we learn here is to never fight again the computer when it does not work until it works!
My last project is about ASM as I have always been curious to go closer and closer to the chip : - 📚 library asm