Two main ways to create hair:
Maya’s own internal system.
Sometimes doesn’t work with other Maya systems as it’s a plug-in.
Select the faces and extract them then planar map it, go to the VFX menu and create nHair. Edit in the attributes. Use Xgen menu to sculpt and brush.
You can also make stylised hair by creating mesh tubes. Delete the tips so it’s hollow. Generate NURBS curves in the tubes by going to XGen> create new description> surface curves. Select> Modify> convert> surfaces to curbs curves.