Your sister IS a little too near the building, I agree. However, I like that she's out of focus, and I like the overcast, blown-out sky. This is a bold photograph. The noisiness of your sister's shirt is poetically mirrored in the noisiness of the foliage--such a prominent visual rhyme can be cloying, but in this case I think it resists overstatement (just barely). Directly between these two living things is a building made up of clinical shapes--windows, roof, clock, the edifice itself. (Much can be read into the eclipsing of the building by a girl and a tree!) The real triumph is that you managed to capture an energy in your sister, an eagerness. The parted lips, fierce gaze, ready hands--your angle complements these elements very nicely.
John pretty much summed this up; however I will add the persective you chose is a nice one...envision this as a vertical with just the taller building to her side framed by a bit of the leaves on the right...this would yield the same type of frame but with even more power to it.....very good attempt here keep on thinking and shooting them
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