Hey, welcome

Good career path? Depends on how much you want it. Infosec can be a great career IF you enjoy it enough to be willing to put the required work in without coming to hate the job. Unfortunately I can't really help you too much there, only you can truely answer.
I'm from the wrongside of the pond to give a US answer to what you should study but EthicalHack3r/Ryan Dewhurst (also UK based) has just
posted about his experiences of 'ethical hacking' degree courses. Hopefully will help you.
Finally just learn everything you can, about everything you can whilst you're young and enjoy the learning; and try not to get too focused on where you want to be. At you age I was intending to be an
accountant beancounter.
Hope this helps