Healing is a skill that is needed throughout energy work, mostly when you fuck up and do damage to yourself or a outside party does damage to you, in a spar, just to be a dickhead, etc. Whatever. Stagnation can also cause damage so it is useful in that case too...
I assume that you can by now feel the pain caused by energetic damage, if not, then you need to work on your sensitivity more then you already have, and then you can work on learning this. Though, this doesn't directly teach you to heal others but it can be used in the same manner to do such.
Okay, focused on the damaged area, make sure you actually know what the damage is though, else you may just do more harm then good... So is it a fractured meridian? Or a stab wound-like thing? Once you understand that, start sending energy to that area, condensing it.
Now, utilize programming to imbue an effect into it of soothing, this in of itself won't heal it, but it'll relieve the pain.
Next, for a wound connect connection "strings" on each side of it as if your stiching it, which is, literally what you are doing. And then simply pull it shut. Of course, this is just a basic method and takes time, but yeah. Once you have done such, you can start putting energy into it to begin to "reconstruct' the energy system in tha region. You can do this manually, or through a construct, but just picture it as rebuilding the piece that's damaged back to what it should be, can't be too hard yes?