Hello, and welcome!

This is called Hypnagogic Imagery, and from the looks of it, it seems you've been inducing (albeit unintentionally), a mini-WILD of sorts. I have to say that I believe your trip to lucid success is going to be a lot easier. From what you're saying, it doesn't seem lucid by any means, but these images are definately the "starts" (if there is such a thing), to dreams.

I recommend that once you reach a sufficient level of dream recall, that you try to intentionally continue these dream 'pockets' (these images), but without control.

Best of luck, man!