Debian 12 to Live Boot USB Conversion

I need an expert to convert my Debian 12 installation into a live boot USB. The USB should preserve user files and settings, installed applications also data related to these applications like databases and other stuff . and use the GRUB bootloader. The preferred desktop environment for the live boot USB is GNOME.

Ideal skills and experience:
- Extensive knowledge of Debian Linux
- Experience with creating live boot USBs
- Familiarity with GRUB bootloader
- Proficiency in GNOME desktop environment
- Ability to configure user files and settings for preservation

Please start your bid from word . you understood correctly