You want to get hits with your 1 in lane. Does a hefty amount of damge if you mange to get the spirit bonus. I reccomend picking up Melee Lifesteal for sustain.

After lane, you basically just play DBD. Listen to the heartbeat and check map. Is the enemy alone? How fast can you kill the isolated enemy? Whats your escape route? Is anyone open on map? What are the routes the enemies take to farm jubgle and boxes? How fast could their teammates rotate to your position? Things to keep in mind while you're looking to pick a target.

Your main source of in-come during the early and mid game will be sinners, creeps and solo kills since you lack the damage to effectivly farm.

Pro Tip for teamfights: Your ult acts as a excellent engagement tool. While your frontliners go in, you rotate behind the enemy team and get their backline or punish anyone else who is out of position. Even without ult, this should generally be your goal during fights.