Ask HN: Resources to Self-Study Communication Systems

Hello folks,

Recently, I developed a genuine interest in information theory and communication systems, I gave "An Introduction to Information Theory: Symbols, Signals and Noise" a try (https://www.amazon.com/dp/0486240614) and I really enjoyed it. I'd like to dig deeper into these topics but I don't know what a good introductory resource (book, course, videos ... etc) about communication systems engineering would be. I am not planning on becoming an expert on this topic, but I'd like to develop a solid engineering understanding of it, just for my own curiosity.

Thank you!

EDIT: grammar and context (text/course/videos ... etc.)