@Bowtie292
How do help them when you don't know anything about these industries yourself? If he was interested in science or a trade then we'd be able to give him plenty of guidance.
You could encourage them to talk to family and friends in different sectors.
When I was at school we had a careers project in year 9 PSHE ahead of selecting GCSE options.
I remember speaking to family members, friends of my parents and some of their grown up kids, work colleagues of my parents, and adults I knew through hobbies as part of my research.
Online research is much easier now but one of the big problems is knowing what jobs are out there and what they involve if you don't have any exposure to them.
The other thing is to consider broad sectors eg. Legal, finance, civil service and look into roles within a sector that is of interest.
Also look at grad schemes for some major employers and see what is involved, what their requirements are, what roles they direct towards.
It is gradual at this age though, just a question of keeping options open and not shutting anything off. A broad idea of A-levels and degree v vocational training might be useful sooner rather than later though.