What helmet for driving school?

Hello Sorry if wrong forum, I don’t know exactly where I should ask Next week I start with driving school, I want A driver’s license. I have full helmet and half helmet. I would prefer to ride with half helmet now, especially because I will often look down because of lines etc, I just have better overview with half helmet. I can also breathe easier at the moment. Since I drive in other city, I can now only take a helmet with me. Is ece22-05 checked, so legal, with visor. Otherwise I have motorcycle boots, jacket and pants with hips protectors and also back protectors and of course motorcycle gloves, so only helmet makes me think. Does the teacher have problems when I come with half-helmet now? Unfortunately I didn’t call last week was with something embarrassing to ask. And what is it for radio or is it just Bluetooth headphones? Supposedly we should communicate like this. Even during the exam. Never used that.