Sorry, I missed your edit. I think charming is supposed to work like this: you chant the name of a spell like healhand or pentacle  and then wait for equilibrium which does take a few seconds and then cast it by typing cast followed by the target. The babbling that you're seeing is probably your character trying to emote which is a bit weird. The only explanation that I can think of is that healhand isn't in your current repertoire  AKA you aren't skilled enough to cast it. Either that or you have the confusion curse which you can get rid of by typing breathe.
The message thing you just type RMSG <player> <Message> and it should send it as long as it isn't way too big and doesn't have special characters. Also I believe it charges you a tiny amount of gold when  you send one so maybe have a handful of gold coins out when you're sending it.

If your charming skill is high enough level and you're not afflicted with something which is hindering casting then I've no idea what it might be.