just blocking the e will make your growth period last longer. more t won't necessarily help, i've a feeling male and female puberty are around the same length, the guys just start a little later. growth without sex hormones is slow but stops much later, so a person with insufficient amounts of sex hormones will be short when other kids hit puberty, but will often end up taller in the end. those who hit puberty too early might outgrow other kids for a while and then suddenly stop just a little shorter than what the other kids will become.
if you've grown slowly because of too little e, the t might give you a nice puberty-like growth spurt, but i'm not sure how likely that is to be the case. i managed to grow one single inch between 12 and 19. my puberty probably started when i was ten, maybe even a little younger.