Quite an interesting 1st lucid dream ^^ You managed to float already that's pretty good!

Yeah, for many people the first lucid dreams kinda tend to be flashy and not last too long. I think it's excitement for the experience Regarding the "things started to fade", that's common in your first adventures, all you need to solve it is stabilize the dream and increase clarity. Take a look at this tutorial

You got yourself a nice tool to repeat the experience, just hold to the memory of your first lucid dream when you go to bed and hopefully the next one is right around the corner