Download Debian 12, bookworm. Firmware is now included in the normal Debian installer images, Debian
If you are a new user to Linux, I would avoid touching distributions like Debian until you have had experience installing and using Ubuntu and Ubuntu based distributions.
To understand the connection between Ubuntu and Debian please visit https://ubuntu.com/community/debian
I have used Ubuntu and Ubuntu based distributions for many years, but only briefly tried to install Debian many years ago. As I remember at the time it was a text based installer.