I recommend to play passive until lvl 6, before 6 farm drones to get as fast as possible to it.
Once you are lvl 6 you have to pull off your combo Q - R - W and then basic attack as soon as ur Q is back up combo Q and again R. if the enemy is running away or are very low you can finish then by another R, if they run away you can wait till ur Q is back up to reduce your ulti cooldown or you can just use R as a gap closer.

At level 6 you wil have a massive power spike , so you are able to kill everyone. But keep in mind to defend the capture points because this is how you win the game.

Another tip is once you get the 5 points you can camp in the fog just before the enemy base. once they come out you can just kill them , or go stealt and follow them for a while and then kill them to reduce the chance that they can run back into the base.

This is my first guide so please give me some tips whats good, whats bad. Are my  tips new to you? Let me know in the comments please, so I can update the guide and make it better or all of you.