Before starting your yoga journey with me I would just ask that you fill out a short medical questionnaire just to make me aware of anything that will help me plan your sessions better for you.
There are always modifications for different yoga poses that enable it to be accessible for all.
Yoga is never about finding the "perfect pose" - its about finding the right pose for you, at this exact moment in time. That pose may even vary from day to day, week to week, depending on what our body needs in the moment.