How do you earn any money or commodity?  You give something of value and someone pays for that in your agreed currency.  Of course if you mean how can I create bitcoin, then that is only through mining.  Anything else is just an exchange.  Sometime the value might be creating posts (advertising) - signature campaign, or maybe exchanging a fiat currency for bitcoin.

Good luck anyway, and hopfully you will earn enough to get to your personal goal.