Alteredriff

I have a new XRS4000 and am new to these boxes and have a couple of questions. 1. I can hear android and application notifications coming in, but how can I view them? 2. How can I tell which applications are actually running and close what I want to? (I know by hitting the Home button 4-times it will close ALL apps) 3. How can I also easily see if something is running on the status-bar? e.g VPN 4. Is there any easy way to run native android apps instead of Android TV apps? e.g Netflx and Youtube.