Worried about my future?

i'm a fifteen year old girl at the moment, year 11, dropping out of tee because, i don't have a career option i want to do that needs university and i just can't commit to it enough and i know by doing it i'm setting myself up to fail and limiting my options. i'm really not a dumb person and i'm capable of doing what i put my mind to, but i hate school more than anything, every day is a constant struggle for me. but i'm sticking at it until i graduate, but once i do that, what do i do? am i going to be poor and be a failure simply because i'm not going to university? society always seems to label university students as better people than those who are not. for myself, working in a cute old record store in the city and having a dingy old flat i can make my own sounds amazing. i don't want buckets of cash, i want happiness. currently my mums telling me to be a youth worker when i leave school and i guess i'll do that but is it possible i could make enough money to live from working full time in a music/clothing store in the city? or is that a weird goal that i'll not realistically be able to achieve and be happy with. i just want some guidance and opinions from others who are older and wiser than myself, but will not judge me like my mother or family. thank you.