Hi and welcome @docmax
About your device, I'm not sure it is currently supported there are the Xperia XZ and Z1 but those are probably the same.
You can head to https://devices.ubuntu-touch.io/ to see a list of supported devices and their progress.
If you want to get your hands dirty, you can try and port for your device.
These links are a good starting point:
https://forums.ubports.com/topic/4328/qa-checklist-for-ported-devices
https://forums.ubports.com/topic/2068/halium-first-steps
I moved your thread considering https://forums.ubports.com/topic/206/will-you-port-to-device-x