Focus on instructors that you find fun. Then as you progress, you can move on to instructors who are more technical riders or push you to your limits. Some fun instructors imho: Ally Love (more inspirational than fun though), Emma Lovewell (a bonus if you like 90's music), and Denis Morton. (Funny, supportive, and calm)
I would recommend filtering on the class type "beginner" as they will go a little easier and have tips about form and technique. Also, if you feel you can't do something the instructor is suggesting feel free to modify by staying seated, going slower or at a lower cadence. Low impact rides are also fine to start with. Good luck!