I was too old for the Brady Bunch as well (also 17). I loved the episode where Schultzy was all glammed up and referred to as the “glamorous Charmaine Schultz”. She looked so 1950s chic.
I don’t remember individual episodes - I just remember I loved that show and Schultzy in particular. She was very similar to Miss Jane on The Beverly Hillbillies - another hilarious actress and a great character. RIP Schultzy!