Well i want to install and play with debian. And i want to make it look awesome (You know flashy, or just futuristic just whoaaa), so what DE should i install and what additional packages and theme for desktop i should use.
kde or xfce
I use kde with breeze theme, inconsolata font, and papirus icons, but there's a bunch of decent options you can check out and download - if you've ever downloaded themes for firefox, it's really not much different, and very simple to test them out. You don't need to reboot or anything.
Some people hate kde because it's a bit unstable/rough around the edge - personally I had mine fail to install a few things (audio control in the taskbar, and some system setting options) but a couple google-searches about the missing things gave me commands to install them.
pic related
>>62213720
Ask your elementary school science teacher.