What matters most is how you feel and feminization. If that's going fine, then you're on the right track. Sublingually, levels fluctuate so much that measuring your E2 levels is pretty useless and in any case, E2 alone cannot tell you if you will get optimal results, individuals vary, their sensitivity so that some may need more, some less.
Androcur not only suppresses T but also blocks it so even tests do not tell the whole picture. Some of the T measured is blocked, so is useless.
Androcur tends to substantially increase prolactin so watch out for that. If you start to lactate, advise your doctor immediately or if you feel constant pressure on your eyes. Also, it causes depression/anxiety in some so if you feel either, let your doctor know as well.