School Lolita for a 3rd grader

My daughter is going to start 3rd grade in a week and while we discussed what back to school clothes she would like she is interested in wearing more Lolita style (honestly not surprising at all due to what she gravitates towards anyways). I have a vague idea but would love any advice from other parents of younger kids or those who maybe have been wearing it since they were younger. Clothing, shoe, accessories, whatever you think would be good to know! We want to keep it very casual for everyday school wear so she’s comfortable and still able to play. However if you have suggestions for places that sell kid sized full blown Lolita attire we want get her some things so she can have those as options and outside of school!