Hi,
I'm flying in Holland and recently finished my CPL (H) training. Finnally I now have my (dutch) CPL (H).
Indeed you should get a Medical and check out where you want to fly, but don't underestimate the theoretical part!
In Holland you need to pass for at least the CPL (H) theory, but if you want to join a big operator, you need to have passed for the ATPL (H) theory.
I saw a couple of enthusiasts begin with flying and the theory course. Some of them weren't able to pass for the theory, resulting in a big loan and a PPL with 50 hours of flight time, but no chance to obtain a CPL...
Check out how this works in the UK, and be honest to yourself, to determine if you're able to pass for the theory bit.
Good Luck!
Flying Dutchie.