It's a simple fact that not all those who are fresh out of school no right away what path they want to take. According to studies, those who already know what they want when it comes to their career decisions are the minority.
So why is that? Obviously, once people finish school they do not have any kind of experience in the real job world. They may perhaps be interested in the one or the other industry but may still be uncertain since they obviously never worked in the field.
This is why apprenticeships can be very helpful.
And apprenticeship allows anyone who is fresh out of school to obtain this type of experience and skills which can also help in making this type of decision.
In previous times, finding available apprenticeships wasn't always very easy. Most companies are not openly advertising apprenticeship vacancies as they will usually do with normal job openings. The Internet however can be a tremendous help here.
Today there is a variety of websites and services that specialise in apprenticeship openings. With those websites you can find open apprenticeships the same way as if you were looking for other types of employment.
I can highly recommend that you see one or more of those websites you looking for an apprenticeship in the UK today. For more information on apprenticeships I recommend you see https://www.gov.uk/apprenticeships-guide/overview.