I just re-learned skateboarding. I spent a lot of time skating in my late teens (37 now), and was decent at it. I noticed three things throughout the learning process this time around. First, there is so much more information available today than when I was a kid. YouTube videos alone could keep me busy for years. Then you add in the GoPro and my phone, and you have an entirely new world available. The one downside here is that I find myself edging towards "paralysis by analysis." Less doing, more thinking, which I never experienced as a kid. Second, I'm forced to take things a little slower because of my age and reluctance to get hurt. This means I've gradually progressed through the learning steps, which has resulted in a stronger foundation than I had as a kid. Third, and this is the big'un, I see angles I never considered before. I'll never be confused for a smart person, and I've always been one step away from "getting it" when learning most new things. Now that I'm older and more aware of what it takes to "get me there" I can better create that learning environment. Example: There is a very subtle part of the tail "pop" in an ollie that I just never fully understood until I started skating again recently, but this time I "got it."
(I realize this falls more in the "relearning" than "learning something new" category, but I've typed too much at this point to bail.)