Although I've taken courses in ancient scripture, including Isaiah, I consider myself an "everyday" reader of the scriptures. I've learned to "delight" in Isaiah by opening the scriptures and reading, even a few minutes at a time. I've certainly been enriched by knowledgeable teachers and additional resources, but this book of scripture connects with my soul primarily when I read Isaiah, not when I read books about Isaiah. You can open your scriptures and delight, too.
(quote somewhere about sister scriptorians, from "Daughters in my kingdom"