Much of the US doesn't even require a class to get a driving license. Just pass the bloody test, get some number of hours of supervised driving (by a parent or other licensed adult usually is all that's required for "supervision"), and pass the practical factor road test.It’s usually way easier than learning to drive a car. I’d say by an order of magnitude.
It’s much more difficult over here.
That said, I've found some systems totally opaque... I had to have Luke Crane explain Apocalypse World's approach to rolls to me, because "To do it, do it" is nonsensical unless you grasp the mindset. Once I grasped that, the system seemed pretty clear. And very much not to my tastes setting-wise.
The hardest switch is when the game requires one to approach some element from a poorly explicated mindset.
Other mechanical elements that have tripped up people:
- Dice tricks
- roll x keep y,
- use 2 dice to generate a 2-3 place number: d100, d66, d60, d50
- Roll, halve, and round-up: d3, d5
- dice shifts
- counting successes
- Two totals for the same dice
- Champions "count the body" - two results: normal is sum of all faces. Body is 1 per die showing 2-5, 2 per 6, and none for 1.
- ORE's height vs width
- Different dice than prior game
- using dice other than d6's
- using dice other than d10's (probably started with WoD or L5R)
- No damage rolls vs Damage rolls.
- shift to symbolic dice. (Going back to the days of WEG's Batman)
- Changes in use of specific attribute names. (Such as splitting Agility vs Dexterity, for a player where they are conjoined into either term.)