The majority of the factual and scientific evidence favors young ages - not millions nor billions - even radio isotope decay has issues, assumptions, anomalies and major problems. Many confuse apparent time lapse with actual measured time lapse. Many are also duped by mainstream groupthink, [hint- which ideas generate the best money flow and carnival show].
For me personally I take the Biblical evidence first and foremost as most accurate, authoritative, and trustworthy. It’s not hard to see why others wear blinders to any facts that contradict long ages though [the Bible tells believers so].
At creation, was Adam young or mature?
Based on your link? So what is the age, based on the majority of the factual and scientific evidence?