Heartbeat, the advice I've heard is do it. The more you give the more you will recieve. Maybe you will be able to do a better job in a year. However, what you can do now may be enough, even if you don't feel it.
I would recommend reviewing the six keys of success. However, since you've expressed some doubt, which I'm sure almost everyone who hasn't performed several healing has some, I feel the important thing would be comming from a place of strong love and caring and to send messages of health.
I'm also think of the water experiments. Where people without chi training bless and cursed differnt bottles of water. The crystals forming in the blessed water where beautiful, and the cursed water crystal lacked the beauty of symmetry. Namely the effect is real regardless of the skill. It's the intent that is important.
Success in your caring, and you are perfection.
Iam2 
