I went online and searched for "fishtail mani", and found a picture on how to paint the fishtail design. I started by painting my accent nails with China Glaze Lemon Fizz, followed by a diagonal strip of Zoya Lolly, then across the other way painted a stripe of China Glaze Peachy Keen, and then went back to Lemon Fizz and repeated it back and forth. Below is the picture I found:
I thought this was a really helpful guide! On my index finger is 3 coats of Lemon Fizz, middle finger is two coats of Peachy Keen, and my pinky is 3 coats of Zoya Lolly (a matte). I sealed everything in with a coat of Seche Vite. Thanks for looking!