That book is a great start, actually. AC theory is critical in understanding RF circuits.

I noticed there were dedicated sections in that book for LC/RLC circuits. In regards to RF, you might see those referenced as resonant tank circuits, so keep that in mind as you move forward.

You aren’t going to see too much about impedance matching until you start working with transmission lines, as far as I know.

I just looked this up and ready through it and it seems like a good intro. It’ll be confusing unless you have a basic understanding of AC: …cadence.com/…/msa2021-understanding-impedance-ma…