Be aware of the consequences of using steroids when you're too young. I used them way too young than when I should. I realize my mistake though as I've gotten older.
Tren is a really good option for strength. I think that a lot of people underestimate it and they don't realize how much stronger they can get on it. Even 250 milligrams is a lot.
There's no reason to overcomplicate creatine. It's one of the cheapest supplements out there and for a good reason. It's very cheap to produce but it also does have good effects on all things from your testosterone levels to your muscles.
uphstore.com is a scammer. I've seen many complaints on them lately. It's a shame because we don't like to see our brothers and sisters get ripped off.
If you want to get your blood work done around that time, it can be useful but at the same time you could have a lot of numbers off. Just be aware of that.
TRT is something that you need to decide on what you want to do. Basic TRT is around 100-125mg/week. But if you want more bodybuilder TRT, you can go 200-300mg/week.