I was in your shoes 10 years ago. I even lived nearby 'between the commons'. I did a full time course over 14 months. It took two years to get my first airline job on turboprops then eventually a jet. It has utterly skinted me and i am struggling along ten years on. However, not a day goes by where i don't think of my ex-colleagues doing bank recs or auditing as i fly overhead in my 737. My humble opinion is that, if anything, accountancy maybe a handicap as you are unlikely to be viewed as the ideal profile of 'Stable extrovert'.
You may get there or not, who knows, but don't start it without being prepared that you may take the long road to get there.