How do I get attention from my family? I have 2 smaller sisters that take all the attention!?

Im a 14 year old guy, and my 5 year old and 11 year old sister take all the attention! ill be in mid sentence and theyll interupt and my parents pay attention to them instead of listining to me! And when i try to tell my parents a story they just nod and are like umm hmm intresting and my little sisters will tell some stupid story and theyll like spazz about it and be excited about it. and my extended family dosnt pay attention and is just critical of me. they all want me to be a doctor or something but i know my calling is in music. im a bit strange like all musicians, but they critizize! (PS im not a negative person this is just how it is) any suggestions? being rebillous dosnt work i just get in trouble. and please no riddicoulous answeres thanks! :)