As you continue, you will find your focus comes easier and lasts longer each successive time. Enjoy this time of self blessing! I highly suggest keeping a written record of your experiences. Make a note of approximately how long you were gazing, and what you saw or felt. In the beginning you may see simple fogs and colors, which is fine. Especially as you become proficient at scrying, note any patterns that work best for you - time of day or night, ritual clothing and jewelry, moon phase, full or empty stomach, etc. Each pattern indicates your own personal scrying style. Follow it for more successful scrying!
To end your scrying session, allow the "clouds" to gather again, then disperse them. Visualize the crystal as a solid object once again. Cover it, and/or return it to it's place. Express gratitude, and open your circle.