I made sure we had pads in the bathroom and that dd knew how to handle things by the time she was 9, but she didn't start until she was 12 1/2, the same age I did.
I had wanted to present her with a basket of pretty cloth in all different sizes and styles and a nice garnet bracelet and a special moon party, but she didn't tell me when her cycles started and handled things fine on her own, just like I did.
Unlike me, it was several years before she switched to tampons. Like me, she handled things fine on her own and I didn't even know she had switched until I reached for what I thought was a full box of tampons and found that it was empty.
At about 14 or 15, she became comfortable talking about menstruation and developed a great sense of humor about it. At 16, I bought her a Diva and she had a great time teasing her brother about the fact that he didn't get a present and they took several silly pictures of her posing with her present.
She was not the slightest bit embarassed to tell me that she had trouble removing the Diva without pain and after my suggestions didn't seem to help much, we both decided that it might be easier for her to give sponges a try and kind of giggled at ourselves at how grossed out we felt at the possibility of accidentally using each other's sponge, although I had grabbed her Diva once in an emergency and neither of us felt squeamish about that at all.
My Sis started her cycles when she was ten and was totally unprepared for it. She still looked and felt like a little girl and I don't think she was even aware of what menstruation was. It was very traumatic for her,.
Sis ate meat, I was lacto-ovo at 12, and dd is vegan.