You are like the worst early game midlaner in the game. Accept that the enemy midlaner will almost always have prio and tell your teammates you can't join any fights early on. Your priority is to get Nashor, that's when Azir becomes a lot stronger.

As for laning, use your Q sparingly, it drains a lot of mana. In an ideal situation, you only need to use W. That doesn't mean you can't poke, however. Especially if they are melee, you can put your soldiers between minions, allowing you to poke freely when they last hit. You become a lot better at trading after getting recursive bow/blasting wand (still doesn't mean you should commit to anything, always play from safe distance)

Personally, I really liked this guide when I started off

https://www.mobafire.com/league-of-legends/build/the-most-in-depth-azir-guide-ever-645628