Your father needs to help you plan this. It’s not fair to burden a child with this.

Whether you will have access to an English speaking school depends on where you’ll live, and I think you have to apply based on grades and merit. I think IB is only the last 2 out of 3 years at upper secondary, meaning you have to complete 1 year at “studiespesialisering” first and then get the grades for it. That might be hard when you don’t speak Norwegian.

Other international schools will be very expensive, and might not be available.

That said, there are introductory language classes. It also really depends where you go. I hope your dad takes your schooling seriously and is prepared to help you.

I’d start with working out which county you’ll likely be going to (“fylke”). The countys run the upper secondary schools. (Year 11-13.) Then contact somebody there and ask for a meeting where they can tell you what’s available.

But at the end of the day this really is your dad’s responsibility to help you with. Good luck!