Hello sweetie! Sorry for not getting back sooner. :)
I got my knees injured from doing squat in the wrong posture. So I am even clearer on the importance of knowing the move well before starting out.
For squatting, when you bend your knees as your body goes down, make sure your knees do not go beyond your toes as you view downwards. This way the tension goes onto your glute and hamstring but not your knees. It’s normal if you feel soreness at your muscle and that should go away in about a week as you carry on with your squat challenge.
Good luck :)