Everyone is different and there is no specific response. The one thing though is that the higher your expectations the more likely you will feel disappointed. HRT is not a magic pill or cure all, it will not work overnight, it takes many, many months for the effects to really be noticeable.
Yes you will probably notice some breast tenderness within the first few weeks but it can take a good year or more before the breasts grow to any substantial size. Remember that teenage genetic girls can take up to three years or more to develop their breasts.
Changes in body fat likewise take many months. The most immediate effects might be less oily and smoother skin, but again that will not be for a few weeks.
Some people notice an immediate emotional change, but that might be a placebo effect. Keep in mind that HRT may make you moody, injections in particular give you an initial high that will dissipate as the dose is used up by the body and become a bit of a low.
So as Dena suggests, just go with the flow. Keep your expectations realistic and take it day by day,