good point estherh.
In addition, it is always a good idea to compliment a young fellow when he starts davening from the amud – even if it wasn’t perfect. and each time tell him how much better he is getting and then if he is making a mistake (usually because they are nervous) you can show gently point it out to him. Sadly, I know adults that will not daven from the amud because of experiences as a recent Bar Mitzvah.