I started skiing @ 29. The whole 'people who skied as kids, etc' trope is only partially true. Presently, I easily out ski the guys and gals I grew up with who 'skied' as kids. Because, like most 'kid, teen, college' skiers they were relatively infrequent fliers, or unfocused sliders whose youthful, rubbery athleticism allowed a host of ungainly movements to work on most hills. Like the vast majority of 'skiing since childhood skiers' , they compiled a fair number of family ski weekends, a few high school trips, a couple of college trips, but no real focused, consistent on snow development . The hills of VT, CO, UT, CA are full of skidding twisters who've 'skied since they were kids' , but as they've aged the gross motor madness that seemed to have no effect on their level of fun years ago is now holding them back.
The 'skied as kids' skiers who stand out as adults that I encounter now are ones who 1. lived up north near a mountain and skied all the time (as, they were part of a family that made it an absolute priority) and, 2. if they are really good, they participated for several seasons in a club-level ski racing program, competitive freestyle program, etc.
Other than that, the higher quality skiers I know may have skied as kids, but it's the fact that in early adulthood they made a stronger and more focused commitment to skiing (joining a ski school, moving to the mountains and becoming part of a 'crew' of rippers, joining a patrol, getting into nastar, etc). And that's what I suggest is the real key: Find a way to ski to a measurable standard-that is, pursue a certification, race goal, anything measurable that forces you to think about technique and work along a set path. Join a ski school and work your way through the national certifications (CSIA, PSIA, AASI, hell, even BASI), get involved in USSA coaching and work through those levels and race NASTAR, Join Patrol and try to become a Full Cert and regional level ski and toboggan instructor, don't just 'go' to PMTS camps, but set becoming a green and eventually blue level instructor as a specific goal.