No experience of such things but it would seem sensible to ask them for a familiarisation session to introduce yourself & your requirements and for them to explain & demonstrate as many of the exercises as they can in a dry environment before you get into the pool. Pools are loud, splashy, echoey places so ask for this to be done somewhere quiet. If they are in the pool with you then it might be a case of being shown something & being asked to repeat it within _your_ limits. The might want to touch you to position you in the correct way or correct your form, best to discuss this beforehand as well. Would Kim be able to accompany you for help & reassurance ?
Suggest using yourself as a reason to get some training videos made showing & explaining the exercises with subtitles ?