Starting from zero is not a failure. It's the only honest starting point.
MathJourney's first course — Foundations of Mathematics — begins at the very beginning. What numbers actually are. Why we have different number systems. How the four operations work and why they're defined the way they are. If that sounds too basic, consider this: most people who struggle with algebra or fractions do so because these foundations were never properly explained to them. Starting here isn't going backwards. It's building the base that makes everything above it stable.
School mathematics is taught under time pressure, with the implicit message that understanding it quickly is intelligence and struggling is failure. Most people who describe themselves as bad at math are actually people who had a gap introduced at some point — a concept that wasn't properly explained, a lesson they missed, a teacher who moved on before they were ready — and then spent years building on top of that gap. MathJourney closes gaps. That's the entire model.
One of the biggest problems with learning math online is that there's too much content and no structure. Videos on YouTube, articles, apps — all useful, none of them a coherent progression. MathJourney is a single ordered path. You always know what you're working on and what comes next. The curriculum is sequenced so that every concept is introduced exactly when you have the foundation to understand it properly.
There's no honest single answer — it depends on your pace, your starting point, and how much time you put in. What we can say: with consistent daily practice of even 20–30 minutes, most people move through a full course in a matter of weeks. More importantly, because of the spaced repetition system, what you learn in those weeks stays learned. You're not cramming. You're building.
Starting from scratch doesn't mean staying there. The MathJourney curriculum goes from absolute foundations through fractions, pre-algebra, algebra, geometry, trigonometry, calculus, linear algebra — and eventually topology. Every subject you've ever heard mentioned and wondered about is on the roadmap. The question isn't whether you can get there. It's how long you're willing to walk.