I think that you will be OK without thinning it. It is a spray paint so should be ready right out the can.
The fun part is getting it out of the spray can and into the
airbrush.
Shake the rattle can well and if you can, put a tube on the nozzle, (WD40 nozzles accept a thin plastic tube, some spray cans can accept a nozzle from WD40.....
Anyhow. once you have decanted some paint into a bottle, let is stand so that the propellant gasses can escape from the paint. Not sure how long that takes.
Oh! I suggest that you decant it out in the garden as it can get a bit messy.