Can't we use structures to implement link lists? (no pointer)

Of course it's possible.

I don't know what the no pointer means, but the stack has a small space and is a space that is organized when it is out of the function.

Eventually, you have to create it on the heap to store a lot of data, or to maintain it (perpetuity), and you have to use a pointer to handle that data.

In order to be good at the language of c, I recommend you to learn assembly language.