Bro, you have great conditioning, just not a lot of mass. I don't believe the idea that you can't carry a lot of mass. I used to have that mentality about myself as a 120lb teenager sosking wet out of high school. Guys like us just have to work a little harder, eat a little more, etc...but it can absolutely be done.
It's your call on whatever you decide to do. I just want you to realize tren is a whole new world and honestly....not exactly a good compound for guys like you and me. I have never been able to gain a pound on tren.