I wondered why you mentioned an integrated course. That is the most expensive option, and impossible to combine with work so requires at least a year's complete loss of income. You also say you know you'll make it. You don't, sorry to tell you. You think you will make it, but you must accept that those who don't (fewer than the pessimists here will tell you) all thought the same. Keep that in mind, it is a factor in your decisions.
As for running out of time, you're not. That feeling is good, as you will need to keep working hard and not sit back, but you do have more than adequate time to do this with hard work and sacrifice.
If you're English ignore Irishpilot and don't even think about university. A-levels might be a wise idea, but no employer I know of in European aviation requires a degree for pilots. The debt you will acquire will set your ambition back several years unless you become a lawyer, and in that case specialise in corporate law, rake in the money and enjoy flying as a hobby.
Good luck!