It's a piece of cake with Elive.
You just allow the installer to do the work for you.
We have a thread going on about that:
Concluding from there I'd wait out a few days for 8.3.28 to show up. There's quite a few enhancements in there that haven't been implemented in older versions yet.
And I did post a review, a while back of moving Ubuntu 18.04 to to Elive 3.8.24 which went quite smoothly.
