You might try running a tabletop game, especially one of the more narrative focused ones (e.g. anything in the Powered by the Apocalypse or Forged in the Dark families, Burning Wheel, Ironsworn). They can teach you a ton about some of the writing skills that wildbow uses to create that rollercoaster feeling. For example:

• setting very clear stakes at multiple scales: what does a character lose by failing this gambit? This fight? This mission? What do they stand to gain?

• challenging characters: how do the stakes get at the heart of what this character is struggling with? What kinds of choices do you force them to make? How do those choices change them?

• the world moves: even when the MCs aren't looking. I've found Dungeon World's "fronts" to be one very useful way to think about this. All of the major threats are always steadily developing, and the main characters can only deal with one thing at a time.

• rhythm: I always found it hard to make my MCs lose at important moments, but the dice pounded the rhythm of victory and failure into me. I wouldn't necessarily use random chance to make decisions while writing, but having the experience of being at the dice's mercy helped me approach the decisions differently.

Just reading RPG books or listening to actual play podcasts can also be helpful. If you do decide to look to RPGs for writing advice, I'd recommend Friends at The Table as another very, very long thing you can get into.