Hit your genetic natural peak before you even think about drugs
I agree with this and that 30 is too young. But some people have their minds made up so only thing you can do is give him advice on the cycle.
45 is a good age to start your first cycle
I did my first and only cycle at 42. 250 test and 250 equipoise per week.
I only gained 10 lbs total but the change in body comp was amazing. My already broad shoulders turned into cannonballs. It also gave me increased endurance on the bicycle, even with the extra weight.
I went nuts with younger wimmenz on dating sites that summer, and got talked up in person a bunch of times. That was a really nice side effect.
I was tempted to go for it again after that, but as I got older it started to seem less worth it. Ymmv.