first cycle at 18

[xor]

Been planning to run 250 test e once im done with my exams, about to be done in 2-3 weeks and im going to cycle it for 20-24 weeks

I've heard about people losing their gains once they go off their cycle, how accurate is that

I planned to buy aromasin and test when starting the cycle, how should i dose my aromasin if I see indicators and am I missing something else I should be getting?