When I go to my Peaceful Place I feel my eyes flickering, which can be distracting – is this normal
It's normal, but not many people have got such a great signal to tell them they are in Alpha. The flickering is the REM state (some people may want to feel it and you can do that by concentrating on your eyes). If it distracts you then let it be OK inside your mind and treat the information "my eyes are flickering" as a thought. Let the thought in and then let it out.