One thing that may help in controlling what Visitor can access is to make them a member of the Guests group, amongst other things the Settings app becomes 'out of bounds'.

Like the Group Policy, you haven't got Local Users and Groups in Home either - but you don't need it. Run Netplwiz, select the Visitor account and click Properties. There's a Group Membership tab here. Select 'Other' and pick Guests from the list.