McCall's Patterns M5613 Size CHJ 7-8-10-12-14 Children's/ Girls' Dresses, Pack of 1, White

Can this dress be slipped over the head if there are no buttons or snaps used?

Does this pattern run big or true to size?

I haven’t sewn in 20+ years is this pattern an easy one to start back up on? I would be making it for my bonus daughter.