I’ve seen people worried that having the screen on during downloads will cause burn in. I thought it would be a good idea for them to implement a screen saver when you’re in the Downloads tab. The screen saver would be completely black, except for text that says “Downloading (Progress)” That way the screen would be essentially off, and the user doesn’t have to wake the screen to see how it’s going. The text would also be moving like the DVD logo to move the pixels around.
Go look up the wullf den OLED switch test. He kept it on for years. It took thousands of hours for any noticeable burn in on a static screen. You have nothing to worry about. Enjoy your new toy. Try not to sweat the small stuff.