There are two primary numbers associated with brushless motors. The first is indicative of the size of the motor, which roughly equates to torque (because that's what bigger motors do) and the second (kv) equates to rotational speed per cells in your battery. Roughly a 1000kv motor on a 3 cell battery will rotate at 3000 ram (unloaded).
Basically though, you can't just go by one or the other number. You want an 1800 or so SIZED motor at around 2200 kv. Go higher in size you get more torque, but too big and the motor won't fit and your not using the power it can provide. Go higher in kv, go faster.
These are simplification and there are more considerations like how big is your model or what size prop do you want to use.
But you want a smaller motor swinging a 6" prop for this bird.
For batteries you want 3 cell lipo batteries in the 850mah range. Like these...
https://www.amazon.com/gp/product/B09CTSCWYM/?tag=lstir-20
Batteries have a "C" rating which Basically equates to how much current draw they can sustain. The ones I linked are 80c, which is pretty high for batteries this size. You could go lower for the mini trainer on an A motor, but if you plan to use the batteries in hotter planes later, might as well go bigger.