For a first timer to tren, I would suggest that you get the each drug in individual bottles. This way you can adjust the dose as needed. If you find that the tren is too strong, you might want to decrease the dose a little but keep the mast and test prop higher. Injecting from individual bottles will allow you to inject your gear in a protocol, optimal to your body's needs. Here is how I'd do it. Keep in mind this is a rough outline and can change as needed
1-12
Prop 100mg EOD
adex as needed
3-12
Tren starting at 50mg EOD. Then over the weeks, you can increase the dose. Maybe 75mg for a while. Then if you want to go higher, 100mg EOD should be plenty
5-12
Masteron 100mg EOD
This would be ideal and you can do it in a more controlled fashion than when using andromix