They all say the best way to learn to ride dirt is ride, ride, ride. I did. I learned about balancing my weight on the pegs and shifting the center of balance over the bike depending on conditions and terrain, the importance of core strength and leg endurance, how to let the bike move underneath me, what to avoid (ruts) and how to pick the bike up when I and it fall down.
I ache. My right tricep feels like it tried to lift or pull a train. My back is tired and my shoulders ache from falling on them, sleeping on them, and push/pulling handlebars.
But it's all good. In fact, I'm hooked. I love riding off-road. But the cycle parks are schools for me, not destinations. There I learn and practice new skills and techniques on various terrains. The real destinations, where all these come into play, are in the forests, deserts, canyons and mountains. I got my taste of that in Tennessee last October.
There's no going back now. I'm addicted.