Dash cam suggestion?

I just got my first car and I was thinking I should probably get a dash cam since it has to stay in the driveway, but I feel out of my depth. I don't have a lot of money so I'm hoping for one that is at most around AU$100. I also think covering both front and rear would be best, but obviously will take advice on that regard. Are there any specific ones you would recommend? I feel completely out of my depth. Also, I'm located in Australia if that makes a difference.