Debian stable to sid/unstable instructions

Steps :

1. Go to Debian website and download netinst.iso file
2. Make a USB stick bootable using Balena or Ventoy
3. Go to UFEI Boot menu and select your live usb.
4. Start installing
5. After installation completion, open the terminal
6. Type su and enter root password
7. now enter nano /etc/apt/sources.list
8. Comment out everything and enter ###### Debian Main sid repos ##### deb http://deb.debian.org/debian/ unstable main contrib non-free-firmware deb-src http://deb.debian.org/debian/ unstable main contrib non-free-firmware ( you can find the txt file here )
9. Save using CTRL + O and Enter
10. Exit using CTRL + X
11. now do apt update
12. and apt full-upgrade