I'm a Christian (Eastern Orthodox) yet Schopenhauer is one of my philosophical heroes.
Have you read this?

Highly recommended.
Yes, I love both the books.
Schopenhauer influenced Friedrich Nietzsche, Ludwig Wittgenstein, Erwin Schrödinger, Albert Einstein, Sigmund Freud, Carl Jung, Leo Tolstoy, Thomas Mann, Hermann Hesse, Marcel Proust, Richard Wagner, Johannes Brahms, Gustav Mahler, etc. After reading S for first time, Wagner had to abandon the work he was working on, and his subsequent works were greatly influenced by S.
If Darwin had published the Origin of Species a few years earlier, it would have massively changed the final edition of S’s WWR.