Hi flightless204, welcome to the Intro class! Your reasons for lucid dreaming sound excellent to me... having fun is a huge, important part of life, and I think it makes perfect sense for this to be your goal, particularly starting out. I've been LDing for a couple of years now, and it's still my main goal!

Congratulations on that first lucid!! This is a huge deal! Don't worry about the short length. With practice, that'll all sort itself out. The dreams are yours and as you practice, you'll get used to keeping yourself in them. One simple trick is to interact with the dream environment a bit and marvel at its detail. Even rubbing your hands together is an easy way to bring yourself further into the dream and enhance it for you, really get you hooked into it.

BTW a dream that's a cross between Avatar and the Matrix?? Sounds like you've got a great dream life going already!

Keep up the great work! Looking forward to hearing about the many LDs you have ahead of you!