もう老齢の初め isn't wrong, but it sounds more like "the beginning of old age" :D It also just sounds very "non-native" to me. 老齢 is quite formal, not really something you'd casually say about yourself, that's what I think anyway :)
I mean Paredes broke a fight just cause they lost isnt valid; and the enzo foul that made cubarsi flying also broke my heart, But never mind it was a great game! Messi will still be in my heart. Also Mbappe winning the Golden Boot made my day so much better.