Of course its general, its the basic mathematical relationships between notes, which work for any genre. I only recommend that book because it uses DAWs as the example and doesn’t fuck about with sheet music notation. Which actually makes it somewhat less complex. There are smaller more succinct guides out there. If you can still find The Raven Spiral Guide its decent and short. I mean…maybe there are genre specific theory books out there…but that seems like saying I’m going to learn Spanish by focusing on an obscure dialect instead of learning the basics.
I honestly know almost nothing about music theory, but the little I know totally changed my my music making. Like honestly having a clue why three notes sound good when played at the same time was a revelation. But OP and anyone else can go about it however they want.
Finding things out for yourself is fine–but learning the relationships between notes as two specific advantages. It gives you language with which you can think about and compose music and allows you to communicate clearly with other musicians. I’m still working on being any good at the second part. But there is nothing worse than doing a collab with someone who is like “I dunno dude, I just picked some notes”.