I don't know whether this has been previously said, But probably the best way to learn to fly helicopters is in the Virtual Arsenal or Editor. This way you can learn how to fly without it being on a public server.
Another thing that someone could probably do is jump onto one of the servers and maybe ask someone to run them through what they do, I have seen a few people do this and the people they were asking were happy to help, It never hurts to ask.
I personally would be happy to help anyone with anything if they come and speak to me.