Hi Finn
Have you taken a look at this? http://www.lifeofanarchitect.com/do-you-want-to-be-an-architect/ There might be some information you can use there.
Also, depending on where you live, might there be an association of licensed architects or something equivalent? Generally speaking, professional associations and their members are willing to share a lot of information & experiences with people that might be interested, either one-on-one or in breakfasts, etc. I don't see why architects would be any different!
Other than that, I have no real advice. I went into college as pre-med, then switched to psychology, then philosophy and ended up graduating with a BA in political sciences, which - naturally enough - led to a first job as a Customer Service Representative in a bank and a subsequent MBA with an Accounting concentration. And today I'm finding I like Quality and Organizational Excellence. So based on personal experience I'd say
a. be prepared for your interests to continue changing as you take classes or are exposed to working life and
b. don't worry if you don't know the final destination, because most people don't
Finally, maybe you'd college on a part-time basis while working is an option? Perhaps that would allow you to explore a wider range of educational options and see what grabs you, while still maintaining a financial cushion for yourself. And then, when you find what you like, you can switch to full-time.