I can

And it's not like an immutable rule, but:
Tren is one of the strongest, most effective but also harshest compounds available to you for building muscle and recomping.
And if you take it, you are more or less guaranteed results just by looking at the weights.
But the mentality of rushing straight to tren, indicates that you are in a rush, unhappy with current results and want to reach some often ambivalent goal as soon as possible - Instead of having a mentality of grinding the gym consistently year after year and watching your diet.
It's also unfortunate to have tren in your first cycle, simply because it is so damn effective. Now nothing else gives you that same boost or the same results, so you can end up in a situation where gym sessions on other AAS, or on no AAS (and the corresponding results) are... underwhelming.
As the other guy said, just milk test first, take it from there - Does it truly matter if you get the results you want next year or in 2 years instead of within 6 months? (if it does, you are less likely to get there at all).