I see I've been referenced!
It doesn't matter so much how you do being a little girl which may be informed say by the era you were brought up in (saying grew up in just doesn't feel right to me) and how much of the past you bring into the adult/little girl you feel the bigger thing is being the girl you feel. It may be more 'alice' little boo peep or more schoolish, it's that space we create to let Her out, resembling us, having suitably childlike fun well away from the tax returns and all that.
Retiring for period where apart from the above, you are able to feel carefree can include say things like being overseen by a person who is assuming a more parental role, keeping you safe as you just let your little side out, for some it may include some "Come along and put your party dress on now" stuff which might appeal if you'd rather let someone else make some choices