Hi Jamie,
Most of your questions are best answered in the experiential learning of doing level II healing. What you learn through/from experience is huge, relative to utilizing level II healing techniques. It sounds like you are having experience, and learning. That's good. Give it time and be patient.
Include scanning in your practice, whether someone is in front of you or not. Be the healer. Be the master. Just do it, no doubts. If nothing happens, nothing happens. Don't go a step farther in thought, or reaction to that. Just drop the thinking about it. When scanning comes up again, just do it again! like you know what you are doing. There is no interference on your part in this. It is better to scan like you know what you are doing, and be non reactive to the result, than to define yourself or ability in any limited way. Take your time, stay open, leave the door open to for increased ability to freely enter.
There is a difference between you looking for, or anticipating, or wanting a feeling in your hand, versus focusing on feeling something in your friend, in a focused state, in a more empty state, less conscious of whether or not your hand will pick something up. You are open, and feeling. You are open to feel the blockage in anyway it might come to you. You sort of face the energy in an open state to feel, as well as holding the integrety of your own energy.
Go with first impressions, move on. Very important...Keep it simple. Once you kick it around in your head, you can lose sight of the first impression.
Yes, you only use the specific organ system colors when giving energy.
You can't do harm clearing a organ or area that is clear. You have an intention behind the whole of what you are doing, and giving energy to many specifics. There is a connectedness within the whole of someone's energy. The whole of someone benefits from a complete healing session.
Include the spine as being as vital as the five organs. Always clear that too, first.
love,
gallen