Interior design or urban planning/design

Hi, I want the hard truth and nothing else, currently I’m in year 11 and I definitely know I have the utmost passion for arts, creativity e.g so I looked into interior design as a career path. However it doesn’t have that much of a good pay and isn’t in demand, it’s predicted to be even less needed in the near future as AI is kinda taking over. On the other hand there is urban planning, specially the Urban planning design and management course at UcL, honestly the reason I have this as a choice for my career is mostly because this is like the only course I’m somehwta interested in UCL, I really really wanna go UCL it’s my lifelong dream and I know I’ll easily land a job with urban planning since it is something the world is needing more and more, its demand is high and pay is good. But based on research it looks EXTREMELY boring, well the urban design part is interesting for me but I know there’s more to it than just design. I want someone to explain to me in detail what they would teach u for this course, what is it even, even after watching lots of videos about it I’m still confused as to what they exactly do. Should I go for passion or money?

Have a look at the information on the following links:
https://www.prospects.ac.uk/careers-advice/what-can-i-do-with-my-degree/urban-planning
https://www.prospects.ac.uk/job-profiles/urban-designer
https://www.rtpi.org.uk/become-a-planner/about-planning/what-a-town-planner-does/
What subjects do you study at A level or equivalent?

I’m in year 11 so I’m studying gcse, but I plan to pick economics, geography and graphic & 3D design for a levels

In that case, you still have time to research uni courses. I recommend you book some uni open days in the Autumn for courses you might be interested in and go to the subject talks. Even if you go to a local uni that you don't intend to apply to, it can help you work out what you can study. Scroll through the course list of a few unis to see what's available and attend talks for any that you think would interest you.