So, you get paid as an apprentice. The minimum apprenticeship wage is less than the minimum wage, to take into account you are training and you are only at work 80% of the time (you are paid for the 20% of time that you are training).
however, you are also considered by DWP to be in full time employment. So parents will no longer receive payments for that child (e.g tax credits , child benefit). So you’ve got to balance that. (Note - you can still get tax credits if it’s a traineeship rather than an apprenticeship, but traineeships are more like work experience and are unpaid).
if you can find an electrician happy to take on an apprentice straight from school, great. But sometimes they may prefer to hire someone who already has a basic qualification from college, then the apprenticeship will be for the next level up.
college courses at 16 are often not full time. So depending on timetable you could have one day a week not at college. During that time you could look for paid employment in a related sector or just any part time job. This wouldn’t affect parents’ income.
these things might not make a difference to your decision, but it might be useful to know.