Boot Ubuntu

Hold down the Volume Up button and push down the power button, but release the power button while still holding down the Volume Up button. Once the 'Surface UEFI' screen appears, you can release the Volume Up button. You should see a screen similar to Figure

Boot Configuration
 drag-and-drop 'USB Storage' to the top.

 Secure Boot option. So, click on 'Security' in

Links
https://support.microsoft.com/en-us/surface/creating-and-using-a-usb-recovery-drive-for-surface-677852e2-ed34-45cb-40ef-398fc7d62c07#bkmk_download11
https://www.microsoft.com/en-us/legal/compliance/energy