Winning a Ranked match won't come easy. It takes knowledge of your character and knowledge of your opponent's character. The more you play the easier wins will come because you will learn the tendencies of online players. People are creatures of habit and you will notice that people repeat the same things over and over again online.
You only need to win once to earn this achievement
Shadow Jago is a very tricky character to learn. Some quick stuff to look at is: his jumping heavy punch (the pizza cutter) is very strong, hard to stop, and is a combo opener. Once you learn the timing you can do a lot of damage with it. The heavy version of the slide is full screen. Most new players do not think to block low. You can get a lot of damage out of the slide before your opponent learns to block.
His instinct is amazing. When you activate instinct try to hit your opponent with a fireball. Once you hit them with a fireball you will steal half their shadow meter for your shadow moves. It only lasts until they hit you, but there is a lot you can do with your opponent's shadow meter.