u/Aardappelvretser

We are making a childrensbook about the yoruba people and I am the Illustrator. I do not know a lot about it and need some information to make it correctly. I want to use beads for the illustration and want to know if there is a specific kind of bead used. Or if any bead is ok? These are the first sketches. If someone could provide me with more info that would be lovely!

I feel the arm is off and the ear aswell but I am blinded. Please helo me point out improvements it takes a lot of time effort