just remember. you can always change your career path.
if you get a sparky apprentice offer then take it, and if a better one comes up you can always change to that option.
also remember, at the end of your 4 years you've got an A Grade like all the others, can lead to so many extras.
also something to think of is how you want to extend that knowledge.
did you want to learn how to program electrical programs (PLC's) and maybe one day be the guy designing control programs for a car manufacturer, choc factory or so on.
would you want to go learn Hazardous areas training and HV and go work on oil rigs and mines.
could you become an elec engineer and be the top rung of the company ladder.
also don't worry bout physics, sure it might help, but so long as you can grasp maths youll be fine.
and the most important thing, as you've said you have enjoyed it.
nothing worse then doing something you wont enjoy, and by liking it your day will go by a lot faster.