That sound issue on windows (along with the brightness not working on laptops) has been on windows for as long as I’ve known windows 10. Sometimes a reboot fixes it, and others it’d never be fixed no matter what you did until you reinstalled. Welcome to Linux. It won’t be perfect, but it’s going to be fun
I usually take a break for about 3 - 5 days after finishing a book. Then just got down the list I have on my Kobo. Make it easier for myself. Just go to the next book without even thinking about it.