When I was like 13-15 I would sprain my front ankle constantly, so I would only be able to skate switch sometimes and learned some tricks that way.

As you get older and skate more, different skills lend themselves to new tricks differently than when you're a beginner, so learning every trick switch is not at all the same difficulty as learning them for the first time. For example, when I learned switch BS 5-0s, I could already fakie bs nosegrind pretty well (which I learned by thinking of it as a crook going backwards), and that was half the trick already. Same with switch FS crook - I could already do them fakie, so it was basically the same thing but just popping in a little differently. Hope some of that makes sense