Not only is there a real satisfaction to painting your own nails, it can also have therapeutic benefits. Between chipping, warping, and smudging, a lot can go wrong with an at-home mani. That isn't to say it's impossible to get an Insta-worthy mani by yourself, it just takes a little practice and a good method. That's where we come in. We had celebrity manicurists spill their secrets on how to do a manicure like a pro, and turns out, it's easier than we thought. All it takes is 9 simple…