It is ideal to lose 2-3 kilos per month. 1 kilo = 7000 calories. 30 if you eat a 500 calorie deficit per day. 500 = 15000 calories, that is about 2 kilos in 1 month. If you mean 2 kilos by enough weight, then you are right, but if you want to lose 5-6 kilos a month with 500 calories (it happens...
Since you use it for 1 month, it does not seriously suppress natural testosterone production. Also, 1 year has passed since. If you take a measurement right now, the results will have nothing to do with this issue.
Personally for first time user I would run no more than 150-200mg weekly. I have ran upwards to 400mg weekly and the sides were no fun. Insomnia, night sweats, lethargy, and zero libido. Less is more with Tren .
You need to know the concentration (mg/ml) in order to know your dosage.
6 weeks is cutting it a tad short, 8 would better, IMHO. Unless you are really estrogen sensitive, just hold onto the tamoxifen and use if needed.
Go ahead and plan out your PCT as part of your cycle. One isn't very good...