I've recently done an article on Anne Boleyn's ladies-in-waiting, which you can find at https://www.theanneboleynfiles.com/anne-boleyns-ladies-in-waiting/8723/
There is also some useful information in the comments section below that on women like Margaret Wyatt and Anne Savage.
Anne was given ladies to attend her from around 1528 when she and Henry were trying to marry and she was more than just a mistress. She would not have had ladies-in-waiting before that point, although she would have known women like Margaret Wyatt and Madge Shelton as personal friends before that point.

CLICK HERE FOR MORE QUESTIONS