There is no pat answer, could be another six months, could be a year or longer or you may not get as curvy as you would like ever without some surgery and implants. Gaining some weight would likely be beneficial, but it should be healthy, toned weight, not just stuffing fast food into your face, lol.
I would have hoped you would have had a better idea of what to expect before you went on hrt to be honest.
I know I researched everything to death, by the time I started, I really had no questions or surprises.