My best suggestion is to play in training matches first. You can try and train your aim and abilities in here without worrying about loosing or your kda. Go around maps and look for good flanking spots you can use, while training your aim with her by just flying around with soar and trying to hit someone to cancel it. Or you can train on flick shots (those are really hard, i still cant do them properly) which is basically when you blink on top of someone, hit them, and blink back. But you dont have wormhole so just blink on top of them, hit them, and try to survive. If you die it doesnt amtter, its a bot match.

I used this tactic when i was training with mal damba. I didnt play him in a regular match until i was level 9 with him.