The best way to make a small fortune in the music industry is, unfortunately, to start with a large fortune. I think it's best to NOT get your hopes up, find work that gives you time for you to make and learn music as well as funding your gear. This way you won't be forced to try and make money (which is a big creativity killer). Once you've refined what makes your music "you" then definitely use some of the advice above and get it out using free sources like YouTube.
A few decades ago, with the right motivation, tons of self-learning, some unique talents, a few fortunate connections and a lot of luck, you could make a decent living. Now, not so much (ignoring the talent-less wastes of flesh that peddle horrible rubbish and pathetic opinions on people in the Top-40 pop genre which, even there requires a lot of what I said in the first sentence of this paragraph).
You're obviously young, so don't let us stop you from going for it but, just realize, it's not going to be an easy road to riches by any stretch of the imagination. So, my advice, is to keep enjoying music (leaving some hope for being that one that makes it), but find another means of income so music doesn't become a burden.
Good luck!