Hi Ella, welcome to Susan's.
I'm pretty new to the transitioning journey too. Not sure about stuff to buy but I started with a good facial cleanser and moisturiser, you have to take good care of your skin. My other must have was laser hair removal for my face and a trimmer for body hair, that's just me though.
I wish you the best for your transition and hope you enjoy your time with us.
Hugs,
Bobbi