2017 Dodge Grand Caravan won't do anything

Is the red light on the dash a lightning bolt in the middle of 2 )(?

No it is a solid red dot . I found from a little more research, that was the security system. I disconnected both cables from the battery and crossed them for about an hour. Then reconnected them to the battery. That stopped the noise, the red light, and the lights flickering. Now it just won’t start. Doesn’t crank at all, all you hear is a click when the key is turned to “run”.

I just ran across a jeep wrangler with the same red dot, I switched the starter relay with another one, still nothing till I took the key and manually locked and unlocked the drivers door. Then it started right up.