Unable to get past Grub on live usb on Dell Inspiron 7710 AIO All in One

[kalpana]

The computer bought newly is Dell Inspiron 7710 All in One PC


1- Comes with pre-installed Windows-11 only
2. Flashed Ubuntu 20.04 on USB using Rufus (GPT)
3. I follow this video to change ONLY BIOS settings (youtube video on a different computer At minute 2:28 of youtube video titled "A clean install of linux mint 21 (Dell UEFI BIOS with Secure Boot and MOK)").
4. Rebooted
5. Grub loads
6. On choosing Ubuntu option in Grub, the screen goes blank


So, I cannot proceed to install Ubuntu.


As, I am beginner in linux and its commands and editors, if it possible to provide me with detailed steps or video that I can follow.

Thanks