Re: Kicking the seat rf
When you install the car seat, check to be sure there is less than 1" movement at the belt path when you shake left/right, up/down, and front/back. Movement at the head of the seat is fine; it's only movement at the belt path that is significant.
If your daughter can kick the seat more than an inch, see if you can tighten the belt any. I find it helps to unbuckle and let the belt click back once then rebuckle.
As long as she's not moving the seat more than 1", kicking won't be a problem. She won't injure herself and her legs aren't strong enough to stretch the seat belt. You can hang a thin towel from the headrest down the back of vehicle seat to prevent wear/tear to the vehicle if you like.
IHA: 1 wool interlock soaker (M/L), 8 lacey bum pocket diapers, 1 Wahmies pocket diapers brand new (OS, pink)