Signals and systems is very difficult

I'm going to pay for the subject of linear signals and systems, and the little I've seen of it has already scared me a lot. I've never studied signs at all and it seems to be an extremely difficult subject to understand, extremely difficult to apply, I tried to study a little and I got really confused. Was it like that with you too? How to deal with this discipline? I know that it is very important to follow control and automation. What materials besides the book did you use to get good at this subject?

That's it guys, I'm just an electrical engineering student a little lost and looking for some light.