Online learning recomendations

Hey everyone — I’m newish to BJJ (3 months in, doing no-gi at a mixed-ability MMA gym) and loving it. The atmosphere’s great, lots of good grappling, but I feel like I’m lacking the “why” behind moves — I don’t yet fully grasp strategy, what makes a position dominant, or why it’s good or bad.

I’m looking to supplement class time with structured online learning (not random YouTube rabbit holes) — something that starts from foundational basics and builds up, so I can better understand what I’m doing and why.

If any of you have used good resources, online academies, or courses that you’d recommend (especially for beginners) — I’d love to hear.