Welcome to the family mate! She's certainly a cutey
A couple of things that may help.
First with Gel boobs that big she's going to need support if she's spending a decent amount of time upright.
These will get you going (you want Small), but a decently fitting bra is must. That however is a bit more trial and error, but we can help if you can give a few measurements (underbust and overbust)
Hair is always an issue, especially at night if you sleep with her. You can get a lot of the problems solve by simply putting her hair in a ponytail at her neck. You can also put a towel or soft sheet under her shoulders and up over the pillow. Then when you put an arm under her neck to cuddle, you go under that towel and dont rub up against her hair
enjoy the learning, its all part of the bonding.
K