What do I need for my tween girls as they approach puberty?

[mumoftweentwins]

I have 11y/o twin girls
I got my first period at 12 and consious this is all coming at me fast!

One Dd is taller broader of hip and small breast buds appearing
Her moods are erratic
She has underarm hair which I have just noticed as I don't bath them any more

Thinking poss better to shave this so as not to be teased but not sure which razor is best and how to show her ?

DTD2 is of a skinnier build, has occasional BO but no other outward signs

Want to get them ready for when periods start. What do I need to buy?
Lots of crap online "my first period" with hair scrunchies etc

I went to boarding school- and mum still refers to it as "the curse"
So no "good role model"
To base this off

TIA for your kindness and help

Another vote for the Milli Hill book. We’re (hopefully) a few years away but the book has been useful for general conversation.

Following-I am in the Sam place with my DD. She is 10 but will be 11 in June. She already is developing breast and hair. I started my periods at 12. My mum never spoke to me about it prepared me. Period swim wear is a good idea. I never thought of that.

I have a 11 year old girl and already she has learn all about it from me. What shall I do? Just buy the necessary items as per need arises , as part of the normal shopping list