In a year I didn't shave my daughter's head, I didn't understand the n…

In a year I didn't shave my daughter's head, I didn't understand the need. There were beautiful curls even and not wanting to shave it all off. Now it turned out bad for me, tiny hair, there is fluff, the child wants to go to ballet, now it's not an option to cut her. What should I do? They will grow back, right? When I wash her head, she has a mop on her head, it's hard to comb through. Also, tell me what shampoo you use for girls? And do you buy separate shampoo separately gel? Our favorite Sanosan is finished, now I think we should buy everything separately.