Thank you for your lovely comment @startreat.
My 5 year old has done the same when I've tried to encourage him to read and write. For me, just letting go and waiting for him to show an interest is enough. Because when they do show that interest they will focus and remember through their own choosing. It also helps to let them see you reading and writing. I like to read out loud to my children. For T, it was seeing his sister write that encouraged him to do the same. I also leave a pen and paper lying around so if he wants to write he can do so of his own accord.
Also don't worry too much I know people who went to Steiner schools, one of them is a writer by profession now and the other an artist. Both doing well.
Hang in There, xx
Hope that helps xoxox