Hello, i just bought a used like new mavic mini. I have never had a drone before and decided this would be a good starter unit. I have a couple questions i am hopping can be answered. First i went to dji to download the fly app and my browser said it was not a safe app. I got scared and didnt download it, is there any alternative safe apps i can down load to fly my mini? Second, it came with a 3 battery charging hub. But is missing the cable and plug, the seller says he found them and shipped them. But just incase they dont show, what amp plug and cable do i need to buy? Thank you