Yup. No worries.

I'm in Gymnasium right now.

Before I was in Sek A.

There's Gymi, Sek A, Sek B, Sek C.

I'm in Gymi now. The main differance between Sek A and Gym is the following one:

-Sek A: 3 YEARS SCHOOL, 3 years job. When you've finished with your job, you can go jobbing.

-Gymi: 6 Years school. When you've finished, you can go to an university, but aren't qualified for a job. No worries.