In a few years time, airline sponsorship might appear as an opportunity for you. Only Aer Lingus are offering full sponsorship this year.
Although it has been known for (very mature) school leavers to be successful, the majority of candidates are probably over 21, with some life experience / higher education.
Self sponsorship can be a risky business ~ if you fail to gain employment. Unfortunately this does happen, and more likely when the economy dips. Typically a 7 year cycle. Don’t spend the money, unless you are prepared to lose all of it.
Plenty of time to explore the options which suit your circumstances. Best option full sponsorship.