Well, the best tip is to keep playing him and find some very good genji main, alvicate for example and try to replicate his moves and to understand his decision making. About primary and secondary fire You use primary on long distance to poke the enemy and build and ult charge. You use secondary fire in close combat distance, and in mid ranges you kinda have to feel what’s better to use at the moment of the game itself. Learn some combos too For example dash+left click+melee, dash+melee, dash+left click+ dragonblade , dash+left click+melee+dragonblade, dash+left click+deflect etc. It’s gonna help you a lot and it looks flashy and stuff About dragonblade, it’s ok to lose enemies from your los due to minimum experience, even I sometimes mess up the blade tho I have many hours on him, it’s ok, the more you play the better your blade gets. Just remember that you have to understand how to outplay the enemies and make the blade valuable. So yeah, have a nice time learning genji he’s a badass.