A5 2017 Always On Display

[BeksAK47]

Hi. I have a problem with my phone. I updated my phone to android 7 now, but I have a problem with AOD, there is a message like "Double tap here to learn how to use always on display", but I can't tap this and I can't disable this message. Is it a way to disable this message?
A second question just for my peace: Can I tap notifications on AOD and these will open my phone on the right app?
Thanks guys, peace !