Last night, I had my second lucid dream. I tried to change the dream scene but was unsuccessful until I did a dream spin. Any advice? Here's the part where it happened:

...I see 2 guys and one of them starts attacking me. As he's coming towards me I realize I'm dreaming. He kicks me in the nuts and I close my eyes and say "When I open my eyes I will e in a small, dark room", remembering my objective for my next lucid dream. I open my eyes and I'm still in the same place. I do it again and nothing happens. Finally I decide to dream spin. I spin and spin and spin until I feel like I've done it. I stop and fall to the floor, dizzy and unable to stand up. As I'm on the ground, I know I'm in the same area I was before but later on in the night....
Also, I heard a loud noise in the waking world and it transferred to my dream, making me lose lucidity. Any tips to avoid that next time?

...My objective for my next lucid dream was to sit down and learn to control and summon stuff in the environment. I single out a rock on the gravel and try to lift it with my mind. I hear a loud noise in the waking world and it transfers to my dream as a gunshot in the distance to my right. It distracts me and I notice my dream ending. I tell myself to dream spin but it's already to late. I lost lucidity and I wake up.