Hedge your bets and fend it off from both ends. Portion control, macros, whatever's your bag, you can't out-exercise a shitty or overabundant diet. Non trans men don't (all) magically blow up during the onset of puberty when T surges for them. It can increase appetite but it's not a "condishun" that dooms you to obeast status. In fact, the lower levels of estrogen should allow you to reach an even lower body fat % than a woman.