Can I sell digital products without an audience?

Yes, but not without distribution — you're substituting engineered channels for a follower count. The playbook: SEO pages targeting long-tail buying intent (use-cases, comparisons, 'X vs Y'), a genuinely good free product that converts searchers into an email list, and affiliate commissions high enough (40-50% on digital margin) that other people's audiences sell for you. Audience-first is faster if you have one; distribution-first compounds harder because you own the channels. Most 'overnight' product successes are one of these two engines, quietly built.