I'm in my 50's. Although I've played NLHE for maybe 15-20 years, I've only been serious about poker since the pandemic.
I've always been keen to continue learning as I've aged. In my line of work (IT, Data, InfoSec) one simply must keep studying or else you become obsolete. it does become more challengin for me with age.
When I was a young whipper snapper, as the say, I could absorb a disgusting amount of information...and recall it. I can still learn a lot now, however, it is by no means as effortless. Now I need to take read, take notes, review notes, read key themes/ideas aloud in order to reinforce those synaptic junctions. My indexing isn't as good as it used to be...so recall is affected and can take more time to locate that piece of memory.
So -- I think there are advantages young bright minds can bring to the table. When it comes to poker, I think poker theory, whether exploitative or GTO or a mixture, is more important than poker experience. In fact, the only thing relevant in terms of experience is your hand history -- ie the data you've got on others...turned into intel.
The game has changed a lot over the years. GTO has significantly changed the landscape of poker in the past five years. Sure, an old dog can pick up a book on GTO, but it isn't the same as starting out with GTO as a basis for your strat. Sure you can learn French, but if your native tongue is English, your French will never be as good as a native speaker. I'm old ernough that I learned to code/program. Procedural programming. I later learned object-oriented programming, but have never been as strong at it as for procedural coding.
Blah blah blah... Long story short... You're not going to be a pro, just because you're young...but you have some advantages. That said, we' oldies are not ready to roll-over and die yet.!
Cheers,
JT