<3 Thank you for trying it out!
I will say, if you lock on to a target you, and get close, the crosshair will align to show you if you are missing or not (so you move the plane so the crosshair lines up; when it does you'll get a hit).
In full game there will be a re-arming mechanic, so you can get more ammo and heal!
And yes, collision will come with damage model (coming up in next few update passes)