My younger son Jesse is 16. He is trained by my eldest son Max, who is 18.
Jesse has been lifting for 3-4 months.
He only uses free weights, is 173cm and 59kg. He is extremely muscular, much leaner than Max.
He can now squat 100kg x 5, powerclean 75kg and deadlifts 140kg I think, I dont get too involved.
I dont know how far Penrith is from Shire Speed and Strength, but thats where I'd be taking him.
Max has shown that if you can get a young kid training correctly from day one, he will surpass all expectations. Max was 51kg when he started.
Like others said, find a proper gym.
I have a few young lifters, 18 and under
Max
Daryl
Jesse
Mick
Nathan
Kasper
Josh
Rory
Joel
Blake
Tom
Cam
Jordy
Ashlee
They only use free weights