Hi Charlie,
Thats very lucky of you. Wish you the best of luck!
I see that your 18, presumably from the UK? bit of a personal question but is there any reason why you didnt apply for the RAF FAA or AAC to be a pilot?
Qatar will be great, A320 then move onto wide body etc TRE Sim instructor career is really set up for you if you do well, rather than start at low cost r/h seat for years and try and get onto longhaul fleet with a national.