As hinted in the video below, you will find the following links helpful. Also, note that you can use my older video to help configure your Ubuntu Linux setup. Here is a tutorial video
Etcher software tutorial
https://www.forbes.com/sites/jasonevangelho/2018/11/19/beginners-guide-how-to-install-ubuntu-linux-18-10/#7ac0987787d2
Boot priority http://www.boot-disk.com/boot_priority.htm
https://www.ubuntu.com/
Tutorial video and link from the past
https://quantlabs.net/blog/2018/12/tutorial-install-ubuntu-desktop-linux-onto-computer-pc/