Hey there, I’m going to throw Variety in there as my favourite wallpaper management tool. After setting it up with a URL from wallhaven.cc pointing to your preferred tag or type of wallpaper you won’t even have to go look for nice wallpapers yourself (e.g. the URL in my variety settings points to the digital art category). Afterwards you can bindsym commands similiar to these in your SwayWM config file and everything will be nicely integrated:

bindsym Shift+Alt+t exec variety -t trash current wallpaper

bindsym Shift+Alt+f exec variety -f favourite current wallpaper

bindsym Shift+Alt+n exec variety -n switch to next wallpaper

bindsym Shift+Alt+p exec variety -p switch to previous wallpaper

Trash, favourite, switch to next or previous wallpaper. Simply a great way to enjoy nice wallpapers without any effort. And if you then sync your fav-wallpaper folder with the cloud provider of your choice you won’t ever lose it.