Dual boot windows/Ubuntu

Hi all, i have installed windows oem image from radxa page on my rock pi x, runs ok. the question is:
I want to install Ubuntu and keep my windows installation, How can i do it?, just ubuntu deserve dual boot? I listen to you. Thanks!

I did this but the other way around. Installed linux first. Then booted from linux usb and shrank the partition creating another 32 gig blank space. Then rebooted from a win 10 usb made with the microsoft utility…

I had no luck installing from the WIM image. Even though I puth the wim file in the images directory, when i boot from a usb with those files from RADXA, I a window full of chinese that counts down and then…nothing.