My first astral travel experience was last year when my guardian Lucifer introduced me to it.
I did it through meditation, well after many practices. I started feeling lighter and lighter until I finally came out of my physical body. But during this process, I found my breathing was getting shorter and shorter. I was really nervous about this because I thought I was dying. As a matter of fact, it did felt like if I was dying. My body started to shake. These weird sensations really disturbed me.
When I finally came out of my body, I panicked because I could not breathe! I tried to gasp for oxygen but I was not getting any. I realized when I started to panic; I came back into my body.
I did not try to do it again until I became calm. I was scared. This was foreign to me. When it happened again I realized that astral bodies did not need to breathe. And if I stayed calm and get over that fear I would feel more comfortable during this experience. I believe fear is a factor that hinders people from astral traveling. Some people like me, have an innate fear of the unknown, especially when it comes to the spirit world.
Another experience which got be frightened was when I actually got to see how the astral world look like. Most of the times it is aquamarine in color, but the color changes to mossy green and blue at times. The lights there seems to take on their own essence. I am still trying to figure out why that is so. Some of the beings I meet tend to give off thick mossy green auras.