There are plenty of plenty of paths to a career in aviation. A word of caution if you are looking at the cadet - airline route however is that airline flying not 'fun', it is usually rather clinical.
There are pros and cons to airlines and for me the pros outweigh the cons. If its a passion of flying the aircraft is what you have, then dont hurry to airlines as that enthusiasm will be quickly tempered.
Enjoy whatever road you take, but for most of us our time in GA or the military was where we had the most fun, and made our best friends.
Cadetships were not available in my time and as much as I'm sure I would have taken one if I could have, Im quietly glad I couldn't.