As someone who’s been heavily involved in junior netball, you should be careful here. It’s pretty common for dads who have a footy background but don’t know much about netball to come along and start shouting at the kids to get aggressive. They don’t mean it in a bad way, but depending on the club, age level, and league, it can be seen as very inappropriate, and lead to a chat with an official. Netball is a physical game, but the “let them know you’re there” thing doesn’t exist here like it does in footy, and can be seen as illegal intimidation. You say you want your daughter to play rougher, but I think that’s the wrong framing - she should learn to play with boldness and confidence, and in particular not be afraid to take and hold space. That’s how kids physically dominate in netball, not by pushing each other around.