Luckily you only need to tap the screen every 5-10% and you'll be fine, maybe even less if you have fast WiFi. If the screen does go blank it still remembers your download progress so it's only really a small inconvenience.
I am frustrated already by reinstalling it on Lumia 950, it is slow, even when I have fast and quality WiFi, but when installing, always getting "Please check your network connection" and have to tap yes to resume almost every minute, seems like it is not even downloading, while network works just fine, on phone and pc, maybe it is server problems that it is downloading from, second day and I am on 25%...
Remember installing it the past, had same issue, but only on 80% to 100% and had only to resume just few times and it completed. Now it is every minute, and downloading only 1-2% a hour. Have no idea WiFi is fine, maybe messed up some setting on phone, no idea.