If there is no foundation, we need to start with some basic courses, establish a basic conceptual framework, and then gradually deepen. C voice, analog electricity, digital electricity and so on.

In the process of learning basic knowledge, you can get a set of development boards and play with attached examples to deepen your understanding and improve your hands-on ability.

In addition, you can visit more embedded development forums.

It's expected to take at least three months ... don't spray.