Ubuntu Touch - sony xperia sp c5303
How do I install Ubuntu Touch on "sony xperia sp c5303"?
You can try to port it yourself or convince someone to do it
I was in the same situation as you. I had Xperia X and really wanted to install Ubuntu Touch on it so it's not hooked on Google 24/7. Ended up exchanging the Xperia for Nexus 5.