Aha.

In: Okula gitmeyi istiyorum, gitmeyi is a definitive noun with the accusative suffix added. So you actually say: I want the act of going to school. "The act of going" is a noun in Turkish and because it is a direct object, it requires the accusative case alongside the transitive verb istemek. Correct?

We are not fighting each other, are we? I hope you are here to learn, not to "win" . Making mistakes is part of the fun. This is simply what learning is all about!  No learning without mistakes.