Lebron in 07: 22 ppg, 7 rpg, 6 apg, 6 turnovers per game 32-90 FGs (35.5%), 4-20 from 3 (20%), 69% FT
Kobe in 00: 15.6 ppg, 4.6 rpg, 4.2 apg, 33-90 FGs (36.6%), 2-10 from 3 (20%), 91% FT
Larry in 81: 15.7 ppg, 15.7rpg (lol), 7apg, 3 turnovers per game, 39-93 FGs (41.9%), 1-3 from 3 (33%), 81% FT
Isiah Thomas in 88: 19.7 ppg, 4.4 rpg, 9 apg, 3.7 turnovers per game, 49-115 (42.6%), FGs, 5-17 from 3 (29.4%), 83% FT
Dirk in 06: 22.8 ppg, 10.8 rpg, 2.5 apg, 41-105 FGs (39%), 6-24 from 3 (25%), 89% FT
Moses in 81: 22.3 ppg, 15.7 rpg, 1.3 apg, 48-119 FGs (40%), 69% FT
Tatum in 22: 21.5 ppg, 7 rpg, 7 assists, 4 turnovers per game 44-120 FGs (36.7%), 20-44 from 3 (45.4%), 65% FTs
I’m sure I could find more examples, but the point is that several genuine superstars of the NBA have floundered in their first Finals appearance. Guys like Dirk & Moses were both 25 or older too. I’m pretty sure it worked out in the end for those guys.