Working with a person with Aphantasia

Hi. I’m a licensed marriage and family therapist working with a 18yo client who has this, and came to therapy for anxiety, some of which seems related and some not. One of the things he is experiencing some fears around driving because he can’t picture a map in his mind. I can see I’m going to be spending a lot is time on this site, but where to I start? Are there guidelines for helping people with Aphantasia and anxiety? Thanks!!