Hello,
When starting your car, don't be in such a rush. Put the key in the ingition and turn it to the point where the immobiliser light comes on (the orange car and key lamp). This lamp tells a story.
If the lamp flashes, before you try and start the car, you have an issue with your cluster or the key fob (the transponder for the immobiliser lives in the key fob.
If the lamp goes out after a few seconds and doesn't flash, then the immobiliser should be fine.
You could do with a scan of your car, which might highlight issues
You don't say how long you've owned the car, or if there has been any work carried out recently, and if the car has been fine and only just started giving this issue, so perhaps you could detail a little more.
Last thing for me on this post - it's not worth keeping the key turned for such a long time when trying to fire up an engine. If the car hasn't started after 5 seconds, stop. Wait for 10 seconds and then try again for another 5 seconds. The longer you keep the starter cranking the engine the hotter the main power looms will be getting, and if you have corrosion on earthing points you stand a chance of looms catching fire and causing untold damage.
Cheers
Jeff