Forget the flying career, I wouldnt if I knew what it would be like.
I really enjoy flying, but flying an airliner from A to B, fixed routes, procedures, middle of night sign ons, etc is not enjoyable, at least once the novelty wears off.
If you have the money saved for the licence, plus buying type ratings each time you want to change companies, then better you hire or buy a light aircraft / homebuilt and fly for fun.
Hire a Piper Cub, buy an RV4 etc etc.
You could buy several with the money it will cost you to pursue a career.
Enjoy your flying