Your security system is a starter disable type system. You can usually jump the starter motor, for testing, to see if it will crank the engine, even if it will crank that doesn't mean it will start, probably won't if security system is involved.
There are safety issues with jumping the starter, you have to be sure tranny is in park or neutral and parking brake is set. Safety is your responsibility.
Unplug starter relay, use jumper wire on load side of relay between two terminals, the load side is that line with arrow head, one of those terminals is hot all the time.
You can try different key, nothing on key ring except that one key. Check for applicable trouble codes. To check codes yourself, at the least, you need an obd2 code reader that will read manufacturer specific codes as well as p0 codes.