In order to play as a child you will need to go into the character creation thing and once you are on there you wil have to pick some presets. SO this is a mod that will allow you to play as a vanilla child, its very simple and shouldnt be hard to start. Fallout 4 connects to and has an interface for downloading mods in game for console users. Bethesda created a portal on where modders can upload mods and interact with other users. Most well-known modders of Bethesda games host their mods on Nexus.
