Just looking at your situation - you are 16. If you went for your PPL now - would you be able to keep flying or at least the minimum for revalidation whilst at college / university? Whilst at uni join the UAS or such like and get some flying at the taxpayers expense or for minimum outlay and apply for any bursaries available such as GAPAN. These will not take you all the way to the (f)ATPL but may well help with the selection process once you start applying for the airlines - showing that you chased every opportunity.