hiya, I would really recommend a big dose of patience. you're feeling 'it will never happen' after only one year, puberty takes a lot longer, about 7 years first time round? your body may be doing other things which are less visible, but all part of the process.
I do think some who've had substantial breast growth within the first year are not the average, most people one known to much longer. I obsessed about the lack of initial growth, it took (to me, at that time) forever, but it did happen, in its own time. remember taking oestrogen is not for the sole purpose of growing breasts, there are a myriad of changes and your body is busy at the moment. Ideally your testosterone should be suppressed, orally or by a gnrh analogue depot (best option) as testosterone will combat oestrogen, and it's generally reputed not to be a nie experience mentally.
BA after one year? you could damage your fledgling breasts, you've no idea what growth is to come. I personally wouldn't recommend it until year 6 (so, after 5 years on unchallenged hormone therapy (with suppressed T) more growth is often experienced after srs, and later changes in therapy ie from oral to gel can also simulate more growth.
A year is nothing, I'm not sure what you'd expect after such a short time. breasts are substantially made out of fat as has been commented, so any weight loss will reduce breast size, and that is just how it is for women. many people who have a larger cup size do so because they have more body fat, and some women who (for whatever reason) have very low body fat, have substantially smaller breasts.
Apart from breast growth, you're skin will be changing, your nails, hair, etc... it doesn't seem a good time to reduce your body's fuel intake, tight when you are asking it to try to do the biggest u-turn possible.
I'd say, take the pills, breathe, wait... those denying you the BA have your best interests at heart. in a few years you could have a perfectly nice rack without intervention 🙂 x
