During early game, you want to wait until you have max charge on your auto attack since you started E. This will deal a high amount of damage over time and give you a higher chance of success during level 2 engage. If you cannot play aggressive against a certain bot lane comp then play safe until you can get a gank. Simply just lantern your jungler or mid laner into lane and flash flay the enemy away from their tower.

RED:This is for control wards during laning phase on your side.
GREEN:Optimal location for warding since it is an entry for each location that the jungler might come from and you guarantee to know where they are.
YELLOW:Optional locations that you can place for vision coverage

You also need to place whatever you need to prioritize like dragon, rift herald, and baron during mid and late game.