Curious - sentence structure and Korean's way of thinking

If Korean sentence structure is back to front compared to English....

Such that:
I want to go to _____
is
______가고 싶어

....does that mean they have to have made up their mind before they verbalise things out loud?
i mean we can say... "hmm... i want to go to..." but Koreans obviously have to say something different... like "어디에 가고 싶은데..."

Me and my random Korean textbook purchases

This is actually a textbook for primary school kid. Random? Not intentionally. I bought it because after a year of beginners level, one can read, and one starts to get curious. Flipping through all these textbook available here in Australia, are just depressing. Not only are the collections of textbook limited to the typical greeting, food, family, transport, school topics - they are simply boring. Typical.
Initially, i was thinking of high school 국어 (language textbook) but then i thought that would be an overload of new vocabs for me (I actually bought some other random set of books before this, that was probably of high school level). So i thought why not a primary school level textbook.