I tend to be agains anyone under 21 cycling, I used to feel 25 was a good age but the fact is alot more teens are showing signs or even bloodwork having low testosterone these days. I personally had test levels in the high 200s when I was only 19 years old and hadnt touched a hormone.
Add to that the fact that if you want to go far in BB ( not saying everyone does or that the OP does ) you have to start early.
OP, personally I think its a little silly to start with Tren on your first cycle but just do your research and have fun. Keep the doses under 350/350 on both compounds, if you have sever sides before you bailout try to lower the test down to 150-200.
problem nowadays is that pretty much everything is LACED with some shit tahts not in the ingredient list. Alot of protein powders have shown to include some form of steroids in them, so nowadays alot of people dont inject themsleves, but unknowingly take steroids, because they take alot of other "supplements". And prohormones fuck with your test levels too
And yeah, if the guy has BB dreams and aspirations, i would tell him to start at the age of 18, because to be an IFBB pro, your health must comein second... so you might as well start as hard and as early as you can... but not everyone wants to be an IFBB pro, its just alot of young guys wanna be jacked, without living the strict lifestyle...