To say "I want to go to school" in English, you can say "I want to go to school." If you want to specify where you want to go to school, you can say something like "I want to go to school at XYZ University" or "I want to attend XYZ School." You can also use the verb "enroll" instead of "attend" if you want to express the idea of registering for a school or program. For example, you could say "I want to enroll in a degree program at XYZ University" or "I want to enroll in an online course at XYZ School."