Not new to SEO but never built backlinks. Looking for actual courses/resources to learn outreach properly.

I've been doing SEO for a while, but I've never actually built a single backlink. Now I want to properly learn link-building outreach, but I'm not looking for scattered blog posts.

I'd rather dive deep into the work of someone who's genuinely considered a leader in this space. Who does the industry really trust when it comes to link-building outreach? Could be an agency founder, a blogger, a course creator, anyone.

I'd love to read their content, case studies, courses, whatever they've put out there. Just looking for a north star to follow so I can learn from someone who actually knows what they're doing.

Appreciate any recommendations.