Hi Sky
Personally for me when i first started on this path and started to give messages one of the hardest things i found was trying not to decipher what information we were given. I'd wonder why i was seeing this or hearing a specific word that seemed to not make any sense. This made things harder work than they needed to be because id spend so much time wondering what things meant half the time the message would be gone before i allowed myself to give it.
So for me the biggest mistake i have learnt from, so far, is not to decipher what we are given, just relay what you have. It is not for the message giver to understand, and once i realised this things became alot easier for me.
I believe we are here to learn, and learning includes mistake making. Dont worry if u give something and the sitter cant relate at that time, maybe they will when they talk to others or it will be something coming up in the future. All we can do is relay what we are given no matter how daft the info may seem.