Why Did My Lucid Dream Feel More Like Imagination Than Reality?

Last night I think I had my first lucid dream.

Before falling asleep, I couldn't sleep for a while and was thinking about buying an island. Eventually, I fell asleep and started dreaming.

From the beginning, I already knew I was dreaming, but I wasn't controlling anything at first. I was just following the dream normally. After some time, I decided to try controlling it.

I was at my school and there was a metal gate/door. I simply thought about opening it, and it opened. That's when I realized I could actually influence the dream.

Then I went to the roof and thought about flying. I got a little scared and decided to wake myself up, so I don't think the flying attempt itself woke me up.

The strange part is that the dream wasn't very vivid. It was kind of blurry and didn't feel like I was actually there. Instead, it felt like my imagination had become 100x stronger than normal, and I was creating things in real time with my mind.

Is this normal for a first lucid dream? Why did it feel more like supercharged imagination than a realistic dream? And how can I make future lucid dreams more vivid, realistic, and stable?