You can be discouraged by failure or you can learn from it. So go ahead and make mistakes make all you can. Because remember that's where you'll find success - on the far side of failure.
It's very clear that there's a lot of double standards going on. Should there be a 30mph speed limit? Of course there bloody should. And certainly with kids and school food kids need to be nannied for sure. So give them a bloody good meal at school.