Congrats on your first lucid dream! You've got a load of wonderful dreaming experiences ahead of you now! It's very cool that you were able to create things in your first lucid dream - I'm yet to be able to do that.

I find napping/sleeping in as you did to be a great way of getting lucid dreams. Finding sleeping in time isn't easy, so enjoy it! Hope you have many more lucid dreams in the future, best of luck experimenting!