I'd wait. The simplicity and the basics are more important. Get him tuned up, introduce him to Howard hill's book, Fred bear's book, asbell's book, Pope's book, etc. He needs a classical archery foundation and a return to simplicity and adventure.
Don't get him thinking about foc and carbon arrows:
You should get him 100% sold on the idea of stump shooting, obstacles, yardage estimation, alternate cants, leaning and twisted shots, half draw, aerial shots, laying down, behind back, etc and emphasize how a compound can do NONE of those things: with the reason being the simplicity of our equipment and the superiority of our technique.
I mean, Foc and single bevels are not new concepts. The Indians knew about them, but they are advanced concepts that require deep thought that a beginner should be devoting toward romanticizing about the philosophical underpinnings of traditional archery and exploring the golden age, the concept of technology not being a replacement for sound woodsmanship, etc.
I mean Foc, shaft diameter, and Ashby concepts are important but without the basics all you have is a well tuned arrow, nothing to shoot at, no passion, and sub-standard skills, and no game animals.