Probably kick-ins instead of throw-ins and any penalties like handballs will be an indirect free kick so they must pass to another player. For goal kicks find out what the rules are. Generally players stand in the goal, but you probably want them to stand further out, whatever is allowed.

Is this kindergarten or first grade? The league should send you rules. In Loudoun Soccer kindergarten did whatever,
and in first grade it was 4v4 with no goalie. There is no offsides but you are not allowed to have a player just stand around upfield to receive passes, and not allowed to keep a defender back.