Embedded Systems Masterclasses
The embedded systems masterclasses are not a very long-form course as the name may not suggest. However, those courses are designed to teach you new skills that will boost your career as an embedded systems engineer or a hobbyist. Each course will help you gain a new skill that will be added to your portfolio and make you a better designer. For example, but not limited to: PCB design, Bootloader design, HMI design, and things like that.
Learn KiCAD PCB Design For Embedded Systems & Microcontroller-Based Projects. This course will help you design your own PCB boards systematically and professionally.