Whether you are doing private or semi-private lessons, you want to make sure you are taking lessons with a yoga instructor who is qualified, will give you the time and attention you need and will pay attention to you as you practice the poses (asanas). It is important to find an instructor who is able to assess what poses you are and aren’t able to do, particularly if you have suffered any injuries or have chronic pain.
An instructor who is knowledgeable about injuries and yoga therapy would be better suited to you if this is the case. Yoga therapists are required to have more significantly more hours of training compared to regular instructors.
You may be excited to try certain asanas, but you may not be ready for them, and it is important that your instructor gage your ability to perform each asana so you don’t injure yourself or exacerbate any old injuries. You can make it a goal to work towards more advanced asanas as you heal from your injuries or build your strength and flexibility.