30 is pretty old
I'm currently working on learning Korean. Also working on my private pilot license. And then there is my constant work towards a sub 3 hour marathon (I'm almost there). Dabbling with music production too.
My 20s were mostly boring, but my 30s are awesome - adventurously and intellectually so. (I'm 36)
Sure, I'll never be world class at anything, but I will constantly challenge myself. That is enough for me.
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[1] Or grow up again… I grew up too much in late teens / very early 20s and have been working my way down since.